- 0 = a mathematical element that when added to another number yields the same number
- 1 = the smallest whole number or a numeral representing this number
- 10 = the cardinal number that is the sum of nine and one
- 100 = ten 10s
- 1000 = the cardinal number that is the product of 10 and 100
- 10000 = the cardinal number that is the product of ten and one thousand
- 100000 = the cardinal number that is the fifth power of ten
- 1000000 = the number that is represented as a one followed by 6 zeros
- 1000000000 = the number that is represented as a one followed by 9 zeros
- 1000000000000 = the number that is represented as a one followed by 12 zeros
- 11 = the cardinal number that is the sum of ten and one
- 12 = the cardinal number that is the sum of eleven and one
- 120 = the cardinal number that is the product of ten and twelve
- 13 = the cardinal number that is the sum of twelve and one
- 14 = the cardinal number that is the sum of thirteen and one
- 144 = twelve dozen
- 15 = the cardinal number that is the sum of fourteen and one
- 16 = the cardinal number that is the sum of fifteen and one
- 17 = the cardinal number that is the sum of sixteen and one
- 1728 = a cardinal number equal to one dozen gross
- 18 = the cardinal number that is the sum of seventeen and one
- 19 = the cardinal number that is the sum of eighteen and one
- 2 = the cardinal number that is the sum of one and one or a numeral representing this number
- 20 = the cardinal number that is the sum of nineteen and one
- 21 = the cardinal number that is the sum of twenty and one
- 22 = the cardinal number that is the sum of twenty-one and one
- 23 = the cardinal number that is the sum of twenty-two and one
- 24 = the cardinal number that is the sum of twenty-three and one
- 25 = the cardinal number that is the sum of twenty-four and one
- 26 = the cardinal number that is the sum of twenty-five and one
- 27 = the cardinal number that is the sum of twenty-six and one
- 28 = the cardinal number that is the sum of twenty-seven and one
- 29 = the cardinal number that is the sum of twenty-eight and one
- 3 = the cardinal number that is the sum of one and one and one
- 30 = the cardinal number that is the product of ten and three
- 4 = the cardinal number that is the sum of three and one
- 40 = the cardinal number that is the product of ten and four
- 440 yards = a unit of length equal to a quarter of 1 mile
- 5 = the cardinal number that is the sum of four and one
- 50 = the cardinal number that is the product of ten and five
- 500 = the cardinal number that is the product of one hundred and five
- 6 = the cardinal number that is the sum of five and one
- 60 = the cardinal number that is the product of ten and six
- 7 = the cardinal number that is the sum of six and one
- 70 = the cardinal number that is the product of ten and seven
- 78 = the cardinal number that is the sum of seventy and eight
- 8 = the cardinal number that is the sum of seven and one
- 80 = the cardinal number that is the product of ten and eight
- 880 yards = a unit of length equal to half of 1 mile
- 9 = the cardinal number that is the sum of eight and one
- 90 = the cardinal number that is the product of ten and nine
- A = the basic unit of electric current adopted under the Systeme International d'Unites / a metric unit of length equal to one ten billionth of a meter
- abamp = a unit of current equal to 10 amperes
- abampere = a unit of current equal to 10 amperes
- abcoulomb = a unit of electrical charge equal to 10 coulombs
- abfarad = a capacitance unit equal to one billion farads
- abhenry = a unit of inductance equal to one billionth of a henry
- abohm = a unit of resistance equal to a billionth of an ohm
- absolute frequency = the number of observations in a given statistical category
- absolute majority = more than half of the votes
- absolute value = a real number regardless of its sign
- absolute viscosity = a measure of the resistance to flow of a fluid under an applied force
- absorptance = a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance
- absorption coefficient = a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance
- absorption unit = a unit for measuring absorption
- abvolt = a unit of potential equal to one-hundred-millionth of a volt
- abwatt = a power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt
- acceleration unit = a unit for measuring acceleration
- accretion = something contributing to growth or increase
- ace = the smallest whole number or a numeral representing this number
- acid value = the amount of free acid present in fat as measured by the milligrams of potassium hydroxide needed to neutralize it
- acre = a unit of area (4840 square yards) used in English-speaking countries
- acre inch = one twelfth of an acre-foot
- acre-foot = the volume of water that would cover 1 acre to a depth of 1 foot
- addend = a number that is added to another number
- addition = a quantity that is added
- Admiralty mile = a former British unit of length equivalent to 6,080 feet
- advantage = first point scored after deuce
- Afghan monetary unit = monetary unit in the Islamic State of Afghanistan
- afghani = the basic unit of money in Afghanistan
- agate line = space for one line of print (one column wide and 1/14 inch deep) used to measure advertising
- agora = 100 agorot equal 1 shekel in Israel
- air mile = a unit of length used in navigation; exactly 1,852 meters
- Albanian monetary unit = monetary unit in Albania
- aleph-nought = the smallest infinite integer
- aleph-null = the smallest infinite integer
- aleph-zero = the smallest infinite integer
- algebraic number = root of an algebraic equation with rational coefficients
- Algerian centime = 100 centimes equal 1 dinar in Algeria
- Algerian dinar = the basic unit of money in Algeria
- Algerian monetary unit = monetary unit in Algeria
- aliquant = an integer that is not an exact divisor of some quantity
- aliquant part = an integer that is not an exact divisor of some quantity
- aliquot = an integer that is an exact divisor of some quantity
- aliquot part = an integer that is an exact divisor of some quantity
- all get out = an unimaginably large amount
- allocation unit = a group of sectors on a magnetic disk that can be reserved for the use of a particular file
- amp = the basic unit of electric current adopted under the Systeme International d'Unites
- ampere = the basic unit of electric current adopted under the Systeme International d'Unites / a former unit of electric current
- ampere-hour = a unit of charge equal to 3600 coulombs
- ampere-minute = a unit of charge equal to 60 coulombs
- ampere-second = a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
- ampere-turn = a unit of magnetomotive force equal to the magnetomotive force produced by the passage of 1 ampere through 1 complete turn of a coil
- Angolan monetary unit = monetary unit in Angola
- angstrom = a metric unit of length equal to one ten billionth of a meter
- angstrom unit = a metric unit of length equal to one ten billionth of a meter
- angular unit = a unit of measurement for angles
- anna = a former copper coin of Pakistan and India
- apothecaries' ounce = a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound
- apothecaries' pound = an apothecary weight equal to 12 ounces or 373.242 grams
- apothecaries' unit = any weight unit used in pharmacy
- apothecaries' weight = any weight unit used in pharmacy
- ar = a unit of surface area equal to 100 square meters
- arcdegree = a measure for arcs and angles
- archine = a Russian unit of length
- arcminute = a unit of angular distance equal to a 60th of a degree
- arcsecond = a 60th part of a minute of arc
- ardeb = a unit of dry measure used in Egypt
- are = a unit of surface area equal to 100 square meters
- area unit = a system of units used to measure areas
- Argentine monetary unit = monetary unit in Argentina
- Armenian monetary unit = monetary unit in Armenia
- armful = the quantity that can be contained in the arms
- arpent = a former French unit of area
- arroba = a liquid measure (with different values) used in some Spanish speaking countries / a unit of weight used in some Spanish speaking countries
- asper = 20 aspers equal 1 kurus in Turkey
- Astronomical Unit = a unit of length used for distances within the solar system
- astronomy unit = a linear unit used for astronomical distances
- at = 100 at equal 1 kip in Laos
- atm = a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
- atmosphere = a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
- atomic mass unit = unit of mass for expressing masses of atoms or molecules
- atomic number = the order of an element in Mendeleyev's table of the elements
- AU = a unit of length used for distances within the solar system
- augend = a number to which another number (the addend) is added
- aught = a quantity of no importance
- austral = the basic unit of money in Argentina
- Australian dollar = the basic unit of money in Australia and Nauru
- Austrian monetary unit = monetary unit in Austria
- Austrian schilling = formerly the basic unit of money in Austria
- avo = 100 avos equal 1 pataca in Macao
- Avogadro number = the number of molecules in a mole of a substance
- Avogadro's number = the number of molecules in a mole of a substance
- avoirdupois = a system of weights based on the 16-ounce pound
- avoirdupois unit = any of the units of the avoirdupois system of weights
- avoirdupois weight = a system of weights based on the 16-ounce pound
- Azerbaijani monetary unit = monetary unit in Azerbaijan
- b = a unit of nuclear cross section
- B.T.U. = a unit of energy equal to the work done by a power of 1000 watts operating for one hour
- B.Th.U. = a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure
- bad block = a block (usually one sector) that cannot reliably hold data
- bag = the quantity of game taken in a particular period (usually by one person) / the quantity that a bag will hold
- bagful = the quantity that a bag will hold
- Bahamian dollar = the basic unit of money in the Bahamas
- Bahrain dinar = the basic unit of money in Bahrain
- Bahrainian monetary unit = monetary unit in Bahrain
- baht = the basic unit of money in Thailand
- baisa = 1,000 baiza equal 1 riyal-omani in Oman
- baiza = 1,000 baiza equal 1 riyal-omani in Oman
- baker's dozen = the cardinal number that is the sum of twelve and one
- balboa = the basic unit of money in Panama
- ban = 100 bani equal 1 leu in Romania / 100 bani equal 1 leu in Moldova
- bandwidth = a data transmission rate
- Bangladeshi monetary unit = monetary unit in Bangladesh
- bar = a unit of pressure equal to a million dynes per square centimeter
- bar absolute = the absolute unit of pressure equal to one dyne per square centimeter
- Barbados dollar = the basic unit of money in Barbados
- barn = a unit of nuclear cross section
- barnful = the quantity that a barn will hold
- barrel = any of various units of capacity / the quantity that a barrel (of any size) will hold
- barrelful = the quantity that a barrel (of any size) will hold
- barrels = the amount that many barrels might hold
- barrow = the quantity that a barrow will hold
- barrowful = the quantity that a barrow will hold
- barye = the absolute unit of pressure equal to one dyne per square centimeter
- baryon number = a number equal to the difference between the number of baryons and the number of antibaryons in any subatomic structure
- base = the positive integer that is equivalent to one in the next higher counting place
- basin = the quantity that a basin will hold
- basinful = the quantity that a basin will hold
- basket = the quantity contained in a basket
- basketful = the quantity contained in a basket
- batch = a large number or amount or extent
- bath = an ancient Hebrew liquid measure equal to about 10 gallons
- battalion = a large indefinite number
- baud = a data transmission rate (bits/second) for modems
- baud rate = a data transmission rate (bits/second) for modems
- bazillion = a very large indefinite number
- bbl = any of various units of capacity
- Beaufort scale = a scale from 0 to 12 for the force of the wind
- Bel = a logarithmic unit of sound intensity equal to 10 decibels
- Belarusian monetary unit = monetary unit in Belarus
- Belgian franc = formerly the basic unit of money in Belgium
- Belize dollar = the basic unit of money in Belize
- Benin franc = the basic unit of money in Benin
- Bermuda dollar = the basic unit of money in Bermuda
- Bhutanese monetary unit = monetary unit in Bhutan
- billion = the number that is represented as a one followed by 9 zeros / the number that is represented as a one followed by 12 zeros
- billionth = one part in a billion equal parts
- billy-ho = an unimaginably large amount
- billyo = an unimaginably large amount
- billyoh = an unimaginably large amount
- bin = the quantity contained in a bin
- binary digit = either 0 or 1 in binary notation
- binful = the quantity contained in a bin
- biquadrate = an algebraic equation or function of the fourth degree
- biquadratic = an algebraic equation or function of the fourth degree
- birdie = a score of one stroke under par on a hole
- birr = the basic unit of money in Ethiopia
- bit = a unit of measurement of information
- block = a sector or group of sectors that function as the smallest data unit permitted
- blood count = the number of red and white corpuscles in a blood sample
- board foot = the volume of a piece of wood 1 foot square and 1 inch thick
- board measure = a system of units for measuring lumber based on the board foot
- Board of Trade unit = a unit of energy equal to the work done by a power of 1000 watts operating for one hour
- boatload = the amount of cargo that can be held by a boat or ship or a freight car
- bob = a former monetary unit in Great Britain
- body count = a count of troops killed in an operation or time period
- body length = the length of your body
- bogey = a score of one stroke over par on a hole
- bolivar = the basic unit of money in Venezuela
- Bolivian monetary unit = monetary unit in Bolivia
- boliviano = the basic unit of money in Bolivia
- Boltzmann's constant = constant used in the calculation of the ideal gas constant
- Botswana monetary unit = monetary unit in Botswana
- bottle = the quantity contained in a bottle
- bottleful = the quantity contained in a bottle
- bowl = the quantity contained in a bowl
- bowlful = the quantity contained in a bowl
- box = the quantity contained in a box
- boxcars = an expression used when two dice are thrown and both come up showing six spots
- boxful = the quantity contained in a box
- brace = two items of the same kind
- Brazilian monetary unit = monetary unit in Brazil
- breakage = the quantity broken
- breathing room = sufficient room for easy breathing or movement
- breathing space = sufficient room for easy breathing or movement
- Brinell number = measure of the hardness of a material
- British capacity unit = a unit of measure for capacity officially adopted in the British Imperial System
- British Imperial System = a system of weights and measures based on the foot and pound and second and pint
- British monetary unit = monetary unit in Great Britain
- British pound = the basic unit of money in Great Britain and Northern Ireland
- British pound sterling = the basic unit of money in Great Britain and Northern Ireland
- British shilling = a former monetary unit in Great Britain
- British system = a system of weights and measures based on the foot and pound and second and pint
- British thermal unit = a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure
- Brix scale = a system for measuring the concentration of sugar solutions
- Brunei dollar = the basic unit of money in Brunei
- BTU = a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure
- bucket = the quantity contained in a bucket
- bucketful = the quantity contained in a bucket
- bugger all = little or nothing at all
- Bulgarian monetary unit = monetary unit in Bulgaria
- bulk modulus = the ratio of the change in pressure acting on a volume to the fractional change in volume
- Burkina Faso franc = the basic unit of money in Burkina Faso
- Burundi franc = the basic unit of money in Burundi
- bushel = a United States dry measure equal to 4 pecks or 2152.42 cubic inches / a British imperial capacity measure (liquid or dry) equal to 4 pecks
- busload = the quantity of cargo or the number of passengers that a bus can carry
- butat = 100 bututs equal 1 dalasi in Gambia
- butut = 100 bututs equal 1 dalasi in Gambia
- byte = a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information
- C = a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second / a degree on the centigrade scale of temperature / ten 10s
- cable = a nautical unit of depth
- cable length = a nautical unit of depth
- cable's length = a nautical unit of depth
- calorie = unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure / a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
- Cambodian monetary unit = monetary unit in Cambodia
- Cameroon franc = the basic unit of money in Cameroon
- can = the quantity contained in a can
- Canadian dollar = the basic unit of money in Canada
- candela = the basic unit of luminous intensity adopted under the Systeme International d'Unites
- candle = the basic unit of luminous intensity adopted under the Systeme International d'Unites
- candlepower unit = a measure of luminous intensity
- canful = the quantity contained in a can
- capacitance unit = a measure of the capacity of a circuit component to store charge
- capacity = the amount of information (in bytes) that can be stored on a disk drive / the amount that can be contained
- capacity measure = a unit of measurement of volume or capacity
- capacity unit = a unit of measurement of volume or capacity
- Cape Verde escudo = the basic unit of money on Cape Verde
- Cape Verde monetary unit = monetary unit on Cape Verde
- capful = the quantity that a cap will hold
- Captain Hicks = the cardinal number that is the sum of five and one
- carat = the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold
- cardinal = the number of elements in a mathematical set
- cardinal number = the number of elements in a mathematical set
- cardinality = the number of elements in a set or group
- carful = the quantity that a car will hold
- carload = the amount of cargo that can be held by a boat or ship or a freight car
- cartload = the quantity that a cart holds
- carton = the quantity contained in a carton
- cartonful = the quantity contained in a carton
- case = the quantity contained in a case
- caseful = the quantity contained in a case
- cask = the quantity a cask will hold
- caskful = the quantity a cask will hold
- catch = the quantity that was caught
- cattie = any of various units of weight used in southeastern Asia
- catty = any of various units of weight used in southeastern Asia
- Cayman Islands dollar = the basic unit of money in the Cayman Islands
- cc = a metric unit of volume equal to one thousandth of a liter
- cd = the basic unit of luminous intensity adopted under the Systeme International d'Unites
- cedi = the basic unit of money in Ghana
- cent = a fractional monetary unit of several countries
- cental = a United States unit of weight equivalent to 100 pounds
- centare = a centare is 1/100th of an are
- centas = 100 centas equal 1 litas in Lithuania
- centavo = a fractional monetary unit of several countries: El Salvador and Sao Tome and Principe and Brazil and Argentina and Bolivia and Colombia and Cuba and the Dominican Republic and Ecuador and El Salvador and Guatemala and Honduras and Mexico and Nicaragua and Peru and the Philippines and Portugal
- centesimo = a fractional monetary unit of several countries: Panama and Italy and Uruguay and Chile
- centiliter = a metric unit of volume equal to one hundredth of a liter
- centilitre = a metric unit of volume equal to one hundredth of a liter
- centime = a fractional monetary unit of several countries: France and Algeria and Belgium and Burkina Faso and Burundi and Cameroon and Chad and the Congo and Gabon and Haiti and the Ivory Coast and Luxembourg and Mali and Morocco and Niger and Rwanda and Senegal and Switzerland and Togo
- centimeter = a metric unit of length equal to one hundredth of a meter
- centimetre = a metric unit of length equal to one hundredth of a meter
- centimo = a fractional monetary unit of Venezuela and Costa Rica and Equatorial Guinea and Paraguay and Spain
- centner = a United States unit of weight equivalent to 100 pounds / in some European countries: a unit of weight equivalent to 50 kilograms / a unit of weight equal to 100 kilograms
- Central African Republic franc = the basic unit of money in the Central African Republic
- century = ten 10s
- cgs = system of measurement based on centimeters and grams and seconds
- cgs system = system of measurement based on centimeters and grams and seconds
- Chadian franc = the basic unit of money in Chad
- chain = a unit of length
- chaldron = a British imperial capacity measure (liquid or dry) equal to 36 bushels
- charge unit = a measure of the quantity of electricity
- check bit = a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's
- chetrum = 100 chetrums equal 1 ngultrum in Bhutan
- Chilean monetary unit = monetary unit in Chile
- Chilean peso = the basic unit of money in Chile
- chiliad = the cardinal number that is the product of 10 and 100
- Chinese monetary unit = the monetary unit in the People's Republic of China
- chlorinity = a measure of the quantity of chlorine or other halides in water
- chon = 100 chon equal 1 won in North Korea / 100 chon equal 1 won in South Korea
- chunk = a substantial amount
- Ci = a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
- cicero = a linear unit of the size of type slightly larger than an em
- cinque = the cardinal number that is the sum of four and one
- cipher = a quantity of no importance / a mathematical element that when added to another number yields the same number
- circular measure = measurement of angles in radians
- circulating decimal = a decimal with a sequence of digits that repeats itself indefinitely
- circulation = number of copies of a newspaper or magazine that are sold / (library science) the count of books that are loaned by a library over a specified period
- cl = a metric unit of volume equal to one hundredth of a liter
- clearance = vertical space available to allow easy passage under something
- cm = a metric unit of length equal to one hundredth of a meter
- coefficient = a constant number that serves as a measure of some property or characteristic
- coefficient of absorption = a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance
- coefficient of drag = the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body
- coefficient of elasticity = the ratio of the applied stress to the change in shape of an elastic body
- coefficient of expansion = the fractional change in length or area or volume per unit change in temperature at a given constant pressure
- coefficient of friction = the ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface
- coefficient of mutual induction = a measure of the induction between two circuits; the ratio of the electromotive force in a circuit to the corresponding change of current in a neighboring circuit
- coefficient of reflection = the fraction of radiant energy that is reflected from a surface
- coefficient of self induction = the ratio of the electromotive force produced in a circuit by self-induction to the rate of change of current producing it, expressed in henries
- coefficient of viscosity = a measure of the resistance to flow of a fluid under an applied force
- Colombian monetary unit = monetary unit in Colombia
- Colombian peso = the basic unit of money in Colombia
- colon = the basic unit of money in Costa Rica; equal to 100 centimos / the basic unit of money in El Salvador
- column inch = a unit of measurement for advertising space
- common denominator = an integer that is a common multiple of the denominators of two or more fractions
- common divisor = an integer that divides two (or more) other integers evenly
- common factor = an integer that divides two (or more) other integers evenly
- common fraction = the quotient of two integers
- common measure = an integer that divides two (or more) other integers evenly
- common multiple = an integer that is a multiple of two or more other integers
- complement = a complete number or quantity
- complex conjugate = either of two complex numbers whose real parts are identical and whose imaginary parts differ only in sign
- complex fraction = a fraction with fractions in the numerator or denominator
- complex number = a number of the form a+bi where a and b are real numbers and i is the square root of -1
- complex quantity = a number of the form a+bi where a and b are real numbers and i is the square root of -1
- composite number = an integer that is divisible without remainder by at least one positive integer other than itself and one
- compound fraction = a fraction with fractions in the numerator or denominator
- compound number = a quantity expressed in two different units
- computer memory unit = a unit for measuring computer memory
- conductance unit = a measure of a material's ability to conduct an electrical charge
- congius = a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters
- Congo franc = the basic unit of money in the Congo
- constant = a number representing a quantity assumed to have a fixed value in a specified mathematical context
- constant of gravitation = the universal constant relating force to mass and distance in Newton's law of gravitation
- constant of proportionality = the constant value of the ratio of two proportional quantities x and y
- containerful = the quantity that a container will hold
- content = the amount that can be contained
- continued fraction = a fraction whose numerator is an integer and whose denominator is an integer plus a fraction whose numerator is an integer and whose denominator is an integer plus a fraction and so on
- conto = 1 conto equals 1,000 escudos in Portugal
- conversion factor = factor by which a quantity that is expressed in one set of units must be multiplied in order to convert it into another set of units
- copeck = 100 kopecks equal 1 ruble in Russia
- cord = a unit of amount of wood cut for burning
- cordage = the amount of wood in an area as measured in cords
- cordoba = the basic unit of money in Nicaragua
- correction = a quantity that is added or subtracted in order to increase the accuracy of a scientific measure
- cosmological constant = an arbitrary constant in the equations of general relativity theory
- coss = a unit of length having different values in different localities
- Costa Rican colon = the basic unit of money in Costa Rica
- Costa Rican monetary unit = monetary unit in Costa Rica
- Cote d'Ivoire franc = the basic unit of money in the Ivory Coast
- coulomb = a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
- count = the total number counted
- couple = two items of the same kind / a small indefinite number
- couplet = two items of the same kind
- cran = a capacity unit used for measuring fresh herring
- craps = expressions used when when two dice are thrown and both come up showing one spot
- crate = the quantity contained in a crate
- crateful = the quantity contained in a crate
- crith = the weight of a liter of hydrogen
- crore = the number that is represented as a one followed by 7 zeros
- crumb = a very small quantity of something
- cu ft = the volume equal to a cube one foot on each side
- cu in = the volume equal to a cube one inch on each side
- cubage unit = a unit of measurement of volume or capacity
- Cuban monetary unit = monetary unit in Cuba
- Cuban peso = the basic unit of money in Cuba
- cubature unit = a unit of measurement of volume or capacity
- cube = the product of three equal terms
- cube root = a number that when multiplied three times equals a given number
- cubic centimeter = a metric unit of volume equal to one thousandth of a liter
- cubic centimetre = a metric unit of volume equal to one thousandth of a liter
- cubic content unit = a unit of measurement of volume or capacity
- cubic decimeter = a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions
- cubic decimetre = a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions
- cubic foot = the volume equal to a cube one foot on each side
- cubic inch = the volume equal to a cube one inch on each side
- cubic kilometer = a unit of capacity equal to the volume of a cube one kilometer on each edge
- cubic kilometre = a unit of capacity equal to the volume of a cube one kilometer on each edge
- cubic measure = a unit of measurement of volume or capacity
- cubic meter = a metric unit of volume or capacity equal to 1000 liters
- cubic metre = a metric unit of volume or capacity equal to 1000 liters
- cubic millimeter = a metric measure of volume or capacity equal to a cube 1 millimeter on each edge
- cubic millimetre = a metric measure of volume or capacity equal to a cube 1 millimeter on each edge
- cubic yard = a unit of volume
- cubit = an ancient unit of length based on the length of the forearm
- cup = a United States liquid unit equal to 8 fluid ounces / the quantity a cup will hold
- cupful = the quantity a cup will hold
- curie = a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
- current unit = a measure of the amount of electric charge flowing past a circuit point at a specific time
- cutoff = a designated limit beyond which something cannot function or must be terminated
- cwt = a British unit of weight equivalent to 112 pounds / a United States unit of weight equivalent to 100 pounds
- cypher = a quantity of no importance / a mathematical element that when added to another number yields the same number
- Cypriot monetary unit = monetary unit in Cyprus
- Cypriot pound = the basic unit of money in Cyprus
- cytotoxicity = the degree to which something is toxic to living cells
- Czech monetary unit = monetary unit in Czech Republic
- D = the cardinal number that is the product of one hundred and five
- dab = a small quantity of something moist or liquid
- dag = 10 grams
- dal = a metric unit of volume or capacity equal to 10 liters
- dalasi = the basic unit of money in Gambia
- dam = a metric unit of length equal to ten meters
- Danish krone = the basic unit of money in Denmark
- Danish monetary unit = monetary unit in Denmark
- daraf = a unit of elastance equal to the reciprocal of a farad
- dB = a logarithmic unit of sound intensity
- deal = a large number or amount or extent
- decade = the cardinal number that is the sum of nine and one
- decagram = 10 grams
- decaliter = a metric unit of volume or capacity equal to 10 liters
- decalitre = a metric unit of volume or capacity equal to 10 liters
- decameter = a metric unit of length equal to ten meters
- decametre = a metric unit of length equal to ten meters
- decibel = a logarithmic unit of sound intensity
- decigram = 1/10 gram
- deciliter = a metric unit of volume equal to one tenth of a liter
- decilitre = a metric unit of volume equal to one tenth of a liter
- decimal = a number in the decimal system / a proper fraction whose denominator is a power of 10
- decimal digit = a digit from 0 to 9 in decimal notation
- decimal fraction = a proper fraction whose denominator is a power of 10
- decimeter = a metric unit of length equal to one tenth of a meter
- decimetre = a metric unit of length equal to one tenth of a meter
- deficit = the score by which a team or individual is losing
- definite quantity = a specific measure of amount
- degree = a measure for arcs and angles / a unit of temperature on a specified scale
- degree Celsius = a degree on the centigrade scale of temperature
- degree centigrade = a degree on the centigrade scale of temperature
- degree day = a unit used in estimating fuel requirements for heating a building
- degree Fahrenheit = a degree on the Fahrenheit scale of temperature
- dekagram = 10 grams
- dekaliter = a metric unit of volume or capacity equal to 10 liters
- dekalitre = a metric unit of volume or capacity equal to 10 liters
- dekameter = a metric unit of length equal to ten meters
- dekametre = a metric unit of length equal to ten meters
- deluge = an overwhelming number or amount
- denier = a unit of measurement for the fineness of silk or nylon or rayon
- denominator = the divisor of a fraction
- dessertspoon = as much as a dessert spoon will hold
- dessertspoonful = as much as a dessert spoon will hold
- dessiatine = a former Russian unit of area equal to 2.7 acres
- deuce = the cardinal number that is the sum of one and one or a numeral representing this number
- deuce-ace = the cardinal number that is the sum of one and one and one
- Deutsche Mark = formerly the basic unit of money in Germany
- Deutschmark = formerly the basic unit of money in Germany
- dg = 1/10 gram
- diddley = a small worthless amount
- diddly = a small worthless amount
- diddly-shit = a small worthless amount
- diddly-squat = a small worthless amount
- diddlyshit = a small worthless amount
- diddlysquat = a small worthless amount
- difference = the number that remains after subtraction
- digit = the length or breadth of a finger used as a linear measure / one of the elements that collectively form a system of numeration
- dinar = the basic unit of money in Algeria / the basic unit of money in Bahrain; equal to 1,000 fils / the basic unit of money in Iraq; equal to 1,000 fils / the basic unit of money in Jordan; equal to 1,000 fils / the basic unit of money in Kuwait
- diopter = a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters
- dioptre = a unit of measurement of the refractive power of a lens which is equal to the reciprocal of the focal length measured in meters
- dirham = worth one tenth of a Kuwaiti dinar; equal 100 fils / 100 dirhams equal 1 dinar in Libya / 100 dirhams equal 1 dinar in Tunisia / the basic unit of money in Morocco; equal to 100 centimes / the basic unit of money in the United Arab Emirates
- dish = the quantity that a dish will hold
- dishful = the quantity that a dish will hold
- displacement unit = a unit of measurement of volume or capacity
- dissociation constant = the equilibrium constant for a reversible dissociation
- distich = two items of the same kind
- dividend = a number to be divided by another number
- divisor = the number by which a dividend is divided / one of two or more integers that can be exactly divided into another integer
- Djibouti franc = the basic unit of money in Djibouti
- dkg = 10 grams
- dkl = a metric unit of volume or capacity equal to 10 liters
- dkm = a metric unit of length equal to ten meters
- dl = a metric unit of volume equal to one tenth of a liter
- dm = a metric unit of length equal to one tenth of a meter
- dobra = the basic unit of money on Sao Tome e Principe
- dol = a unit of pain intensity
- dollar = the basic monetary unit in many countries
- dollop = a small measure
- Dominican dollar = the basic unit of money in Dominica
- Dominican monetary unit = monetary unit in the Dominican Republic
- Dominican peso = the basic unit of money in the Dominican Republic
- dong = the basic unit of money in Vietnam
- doodly-squat = a small worthless amount
- doppelzentner = a unit of weight equal to 100 kilograms
- dosage = the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
- dose = the quantity of an active agent (substance or radiation) taken in or absorbed at any one time
- double digit = a two-digit integer
- double eagle = a score of three strokes under par on a hole
- double-bogey = a score of two strokes over par for a hole
- doubleton = a pair of playing cards that are the only cards in their suit in the hand dealt to a player
- dozen = the cardinal number that is the sum of eleven and one
- dozens = a large number or amount
- drachm = a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce / a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters / a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
- drachma = formerly the basic unit of money in Greece / a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
- drag coefficient = the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body
- dram = the basic unit of money in Armenia / 1/16 ounce or 1.771 grams / a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
- dreg = a small amount of residue
- drib = a small indefinite quantity
- driblet = a small indefinite quantity
- drop = a small indefinite quantity
- droplet = a tiny drop
- dry measure = a unit of capacity for dry commodities
- dry pint = a United States dry unit equal to 0.5 quart or 33.6 cubic inches
- dry quart = a United States dry unit equal to 2 pints or 67.2 cubic inches
- dry unit = a unit of capacity for dry commodities
- duad = two items of the same kind
- duck = a score of nothing by a batsman
- duck's egg = a score of nothing by a batsman
- duet = two items of the same kind
- duo = two items of the same kind
- duodecimal = one part in twelve equal parts
- duodecimal digit = a digit from 0 to 11 in duodecimal notation
- dustpan = the quantity that a dustpan will hold
- dustpanful = the quantity that a dustpan will hold
- Dutch florin = formerly the basic unit of money in the Netherlands
- Dutch monetary unit = monetary unit in the Netherlands
- dyad = two items of the same kind
- dynamic viscosity = a measure of the resistance to flow of a fluid under an applied force
- dyne = a unit of force equal to the force that imparts an acceleration of 1 cm/sec/sec to a mass of 1 gram
- e = the base of the natural system of logarithms
- eagle = a score of two strokes under par on a hole
- EB = a unit of information equal to 1024 pebibytes or 2^60 bytes / a unit of information equal to 1000 petabytes or 10^18 bytes / a unit of information equal to 1000 petabits or 10^18 bits
- Ebit = a unit of information equal to 1000 petabits or 10^18 bits
- Ecuadoran monetary unit = monetary unit in Ecuador
- Egyptian monetary unit = monetary unit in Egypt
- Egyptian pound = the basic unit of money in Egypt
- EiB = a unit of information equal to 1024 pebibytes or 2^60 bytes
- Eibit = a unit of information equal to 1024 pebibits or 2^60 bits
- eight = the cardinal number that is the sum of seven and one
- eighteen = the cardinal number that is the sum of seventeen and one
- eighter = the cardinal number that is the sum of seven and one
- eighter from Decatur = the cardinal number that is the sum of seven and one
- eighth = one part in eight equal parts
- eighty = the cardinal number that is the product of ten and eight
- El Salvadoran colon = the basic unit of money in El Salvador
- El Salvadoran monetary unit = monetary unit in El Salvador
- elastance unit = the reciprocal of capacitance
- elastic modulus = the ratio of the applied stress to the change in shape of an elastic body
- elbow room = space for movement
- electromagnetic unit = any of various systems of units for measuring electricity and magnetism
- electron volt = a unit of energy equal to the work done by an electron accelerated through a potential difference of 1 volt
- electrostatic unit = any of various units of electricity based on forces of interaction between electric charges
- eleven = the cardinal number that is the sum of ten and one
- em = a linear unit (1/6 inch) used in printing / a quad with a square body
- em quad = a quad with a square body
- emu = any of various systems of units for measuring electricity and magnetism
- en = half the width of an em
- energy unit = a unit of measurement for work
- engineer's chain = a unit of length
- English system = a system of weights and measures based on the foot and pound and second and pint
- ennead = the cardinal number that is the sum of eight and one
- enough = an adequate quantity
- epha = an ancient Hebrew unit of dry measure equal to about a bushel
- ephah = an ancient Hebrew unit of dry measure equal to about a bushel
- equilibrium constant = the ratio of concentrations when equilibrium is reached in a reversible reaction
- equivalent-binary-digit factor = the average number of binary digits needed to express one radix digit in a numeration system that is not binary
- erg = a cgs unit of work or energy
- Erlang = a unit of traffic intensity in a telephone system
- escudo = the basic unit of money on Cape Verde; equal to 100 centavos / formerly the basic monetary unit of Portugal
- Estonian monetary unit = monetary unit in Estonia
- Ethiopian monetary unit = monetary unit in Ethiopia
- euro = the basic monetary unit of most members of the European Union
- Eurodollar = a United States dollar deposited in a European bank and used as an international currency to finance trade
- eV = a unit of energy equal to the work done by an electron accelerated through a potential difference of 1 volt
- exabit = a unit of information equal to 1000 petabits or 10^18 bits
- exabyte = a unit of information equal to 1024 pebibytes or 2^60 bytes / a unit of information equal to 1000 petabytes or 10^18 bytes
- exbibit = a unit of information equal to 1024 pebibits or 2^60 bits
- exbibyte = a unit of information equal to 1024 pebibytes or 2^60 bytes
- expansivity = the fractional change in length or area or volume per unit change in temperature at a given constant pressure
- explosive unit = any unit for measuring the force of explosions
- exposure = the intensity of light falling on a photographic film or plate
- extremum = the most extreme possible amount or value
- eye-drop = a drop from an eye dropper
- eyedrop = a drop from an eye dropper
- eyrir = 100 aurar equal 1 krona in Iceland
- F = the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates / a degree on the Fahrenheit scale of temperature
- factor = any of the numbers (or symbols) that form a product when multiplied together / one of two or more integers that can be exactly divided into another integer
- factor of proportionality = the constant value of the ratio of two proportional quantities x and y
- Fanny Adams = little or nothing at all
- farad = the capacitance of a capacitor that has an equal and opposite charge of 1 coulomb on each plate and a voltage difference of 1 volt between the plates
- fathom = a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore / a linear unit of measurement (equal to 6 feet) for water depth
- fellow = one of a pair
- femtometer = a metric unit of length equal to one quadrillionth of a meter
- femtometre = a metric unit of length equal to one quadrillionth of a meter
- femtovolt = a unit of potential equal to one quadrillionth of a volt
- fen = 100 fen equal 1 yuan in China
- fermi = a metric unit of length equal to one quadrillionth of a meter
- Fibonacci number = a number in the Fibonacci sequence
- field capacity = the maximum amount of water that a particular soil can hold
- field strength unit = an electromagnetic unit of magnetic intensity
- fifteen = the cardinal number that is the sum of fourteen and one
- fifth = a quantity of liquor equal to one fifth of a United States gallon / one part in five equal parts
- fifth part = one part in five equal parts
- fifty = the cardinal number that is the product of ten and five
- fifty percent = a half expressed as a percentage
- figure = one of the elements that collectively form a system of numeration
- Fiji dollar = the basic unit of money in Fiji
- fill = a quantity sufficient to satisfy
- filler = 100 filler equal 1 forint in Hungary
- fils = a fractional monetary unit in Bahrain and Iraq and Jordan and Kuwait
- fin = the cardinal number that is the sum of four and one
- finger = the length or breadth of a finger used as a linear measure
- finger's breadth = the length or breadth of a finger used as a linear measure
- fingerbreadth = the length or breadth of a finger used as a linear measure
- Finnish mark = formerly the basic unit of money in Finland
- Finnish monetary unit = monetary unit in Finland
- firkin = a British unit of capacity equal to 9 imperial gallons
- first = the first element in a countable series
- fistful = the quantity that can be held in the hand
- fistmele = about seven inches
- five = the cardinal number that is the sum of four and one
- five hundred = the cardinal number that is the product of one hundred and five
- fivesome = the cardinal number that is the sum of four and one
- fixed-point number = a number represented in fixed-point notation
- flask = the quantity a flask will hold
- flaskful = the quantity a flask will hold
- floating-point number = a number represented in floating-point notation
- flock = a large number or amount or extent
- flood = an overwhelming number or amount
- florin = formerly the basic unit of money in the Netherlands; equal to 100 cents / the basic unit of money in Suriname
- fluid drachm = a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce / a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters
- fluid dram = a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce / a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters
- fluid ounce = a United States unit of capacity or volume equal to 1.804 cubic inches / a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters
- fluidounce = a United States unit of capacity or volume equal to 1.804 cubic inches / a British imperial unit of capacity or volume (liquid or dry) equal to 8 fluid drams or 28.416 cubic centimeters
- fluidram = a unit of capacity or volume in the apothecary system equal to one eighth of a fluid ounce / a British imperial capacity measure (liquid or dry) equal to 60 minims or 3.5516 cubic centimeters
- flux density unit = a measure of the amount of flux per unit of cross sectional area
- flux unit = a measure of the strength of a magnetic field per unit area
- foot = a linear unit of length equal to 12 inches or a third of a yard
- foot-lambert = a former luminance unit equal to one lumen per square foot
- foot-pound = a unit of work equal to a force of one pound moving through a distance of one foot
- foot-poundal = a unit of work equal to a force of one poundal moving through a distance of one foot
- foot-ton = 2240 foot-pounds
- footcandle = a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle
- footer = the height or length of something in feet
- footstep = the distance covered by a step
- force unit = a unit of measurement of physical force
- forint = the basic unit of money in Hungary
- formatted capacity = the usable capacity of a disk drive
- forty = the cardinal number that is the product of ten and four
- four = the cardinal number that is the sum of three and one
- fourscore = the cardinal number that is the product of ten and eight
- foursome = the cardinal number that is the sum of three and one
- fourteen = the cardinal number that is the sum of thirteen and one
- fourth = one of four equal parts
- fourth part = one of four equal parts
- fourth power = an algebraic equation or function of the fourth degree
- fraction = the quotient of two rational numbers
- fractional monetary unit = a monetary unit that is valued at a fraction (usually one hundredth) of the basic monetary unit
- frail = the weight of a frail (basket) full of raisins or figs
- franc = the basic monetary unit in many countries
- French franc = formerly the basic unit of money in France
- frequency = the number of observations in a given statistical category
- ft = a linear unit of length equal to 12 inches or a third of a yard
- ft-L = a former luminance unit equal to one lumen per square foot
- fthm = a unit of volume (equal to 6 cubic feet) used in measuring bodies of ore / a linear unit of measurement (equal to 6 feet) for water depth
- fuck all = little or nothing at all
- fudge factor = a quantity that is added or subtracted in order to increase the accuracy of a scientific measure
- fundamental measure = one of the four quantities that are the basis of systems of measurement
- fundamental quantity = one of the four quantities that are the basis of systems of measurement
- furlong = a unit of length equal to 220 yards
- G = the universal constant relating force to mass and distance in Newton's law of gravitation / a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes / a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes / a unit of force equal to the force exerted by gravity
- g-force = a unit of force equal to the force exerted by gravity
- Gabon franc = the basic unit of money in Gabon
- gain = a quantity that is added
- gal = United States liquid unit equal to 4 quarts or 3.785 liters / a unit of gravitational acceleration equal to one centimeter per second per second
- gallon = United States liquid unit equal to 4 quarts or 3.785 liters / a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters
- Gambian monetary unit = monetary unit in Gambia
- game = the score at a particular point or the score needed to win
- gamma = a unit of magnetic field strength equal to one-hundred-thousandth of an oersted
- gas constant = the universal constant in the gas equation: pressure times volume = R times temperature
- gauss = a unit of magnetic flux density equal to 1 maxwell per square centimeter
- gazillion = a very large indefinite number
- GB = a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes / a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes / a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits / a unit of magnetomotive force equal to 0.7958 ampere-turns
- Gbit = a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits
- gee = a unit of force equal to the force exerted by gravity
- geographical mile = a former British unit of length equivalent to 6,080 feet
- geometric pace = a modern version of the Roman pace now taken to be 5 feet
- Georgian monetary unit = monetary unit in Georgia
- German mark = formerly the basic unit of money in Germany
- German monetary unit = monetary unit in Germany
- Ghanian monetary unit = monetary unit of Ghana
- Gi = a unit of magnetomotive force equal to 0.7958 ampere-turns
- GiB = a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
- gibibit = a unit of information equal to 1024 mebibits or 2^30 (1,073,741,824) bits
- gibibyte = a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
- Gibit = a unit of information equal to 1024 mebibits or 2^30 (1,073,741,824) bits
- gigabit = a unit of information equal to 1000 megabits or 10^9 (1,000,000,000) bits
- gigabyte = a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes / a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes
- gilbert = a unit of magnetomotive force equal to 0.7958 ampere-turns
- gill = a United States liquid unit equal to 4 fluid ounces / a British imperial capacity unit (liquid or dry) equal to 5 fluid ounces or 142.066 cubic centimeters
- glass = the quantity a glass will hold
- glassful = the quantity a glass will hold
- gm = a metric unit of weight equal to one thousandth of a kilogram
- gobs = a large number or amount
- good deal = a large number or amount or extent
- googol = a cardinal number represented as 1 followed by 100 zeros
- googolplex = a cardinal number represented as 1 followed by a googol of zeros
- goose egg = a quantity of no importance
- gourde = the basic unit of money in Haiti
- grad = one-hundredth of a right angle
- grade = one-hundredth of a right angle
- grain = 1/7000 pound; equals a troy grain or 64.799 milligrams / 1/60 dram
- gram = a metric unit of weight equal to one thousandth of a kilogram
- gram atom = the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element
- gram calorie = unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure
- gram molecule = the molecular weight of a substance expressed in grams
- gram-atomic weight = the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element
- gramme = a metric unit of weight equal to one thousandth of a kilogram
- grand = the cardinal number that is the product of 10 and 100
- gravitational constant = the universal constant relating force to mass and distance in Newton's law of gravitation
- gray = the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter
- great deal = a large number or amount or extent
- great gross = a cardinal number equal to one dozen gross
- great hundred = the cardinal number that is the product of ten and twelve
- greatest common divisor = the largest integer that divides without remainder into a set of integers
- greatest common factor = the largest integer that divides without remainder into a set of integers
- Greek drachma = formerly the basic unit of money in Greece
- Greek monetary unit = monetary unit in Greece
- Grenada dollar = the basic unit of money in Grenada
- groschen = 100 groschen equal 1 schilling in Austria
- gross = twelve dozen
- gross ton = a British unit of weight equivalent to 2240 pounds
- grosz = 100 groszy equal 1 zloty in Poland
- guarani = the basic unit of money in Paraguay
- Guatemalan monetary unit = monetary unit in Guatemala
- guilder = formerly the basic unit of money in the Netherlands; equal to 100 cents / the basic unit of money in Suriname
- Guinea-Bissau monetary unit = monetary unit in Guinea-Bissau
- Guinea-Bissau peso = the basic unit of money in Guinea-Bissau
- Guinean franc = the basic unit of money in Guinea
- Guinean monetary unit = monetary unit in Guinea
- gulden = formerly the basic unit of money in the Netherlands; equal to 100 cents / the basic unit of money in Suriname
- Gunter's chain = a unit of length
- Guyana dollar = the basic unit of money in Guyana
- Gy = the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter
- h = the constant of proportionality relating the energy of a photon to its frequency
- H.P. = a unit of power equal to 746 watts
- ha'p'orth = the amount that can be bought for a halfpenny
- hair = a very small distance or space
- hair's-breadth = a very small distance or space
- hairsbreadth = a very small distance or space
- Haitian centime = 100 centimes equal 1 gourde in Haiti
- Haitian monetary unit = the monetary unit in Haiti
- haler = 100 halers equal 1 koruna in Czech Republic / 100 halers equal 1 koruna Slovakia
- half = one of two equal parts of a divisible whole
- half a dozen = the cardinal number that is the sum of five and one
- half mile = a unit of length equal to half of 1 mile
- half pound = 8 ounces avoirdupois
- halfpennyworth = the amount that can be bought for a halfpenny
- hand = a unit of length equal to 4 inches
- handbreadth = any unit of length based on the breadth of the human hand
- handful = the quantity that can be held in the hand / a small number or amount
- handsbreadth = any unit of length based on the breadth of the human hand
- hao = 10 hao equal 1 dong in Vietnam
- hatful = as many or as much as a hat will hold / (often followed by `of') a large number or amount or extent
- haul = the quantity that was caught
- haymow = a mass of hay piled up in a barn for preservation
- head = the length or height based on the size of a human or animal head
- head count = number of people in a particular group
- headcount = number of people in a particular group
- headful = the quantity of information that a head will hold
- headroom = vertical space available to allow easy passage under something
- headspace = the volume left at the top of a filled container (bottle or jar or tin) before sealing
- headway = vertical space available to allow easy passage under something
- heap = a large number or amount or extent
- heaps = a large number or amount
- heat unit = a unit of measurement for work
- hectare = a unit of surface area equal to 100 ares
- hectogram = 100 grams
- hectoliter = a metric unit of volume or capacity equal to 100 liters
- hectolitre = a metric unit of volume or capacity equal to 100 liters
- hectometer = a metric unit of length equal to 100 meters
- hectometre = a metric unit of length equal to 100 meters
- heller = 100 halers equal 1 koruna in Czech Republic / 100 halers equal 1 koruna Slovakia
- henry = a unit of inductance in which an induced electromotive force of one volt is produced when the current is varied at the rate of one ampere per second
- heptad = the cardinal number that is the sum of six and one
- hexad = the cardinal number that is the sum of five and one
- hexadecimal digit = a digit from 0 to 15 in hexadecimal notation
- hg = 100 grams
- high bit = the most significant bit in a byte
- highest common factor = the largest integer that divides without remainder into a set of integers
- hin = ancient Hebrew unit of liquid measure = 1.5 gallons
- hint = a just detectable amount / a slight but appreciable amount
- hl = a metric unit of volume or capacity equal to 100 liters
- hm = a metric unit of length equal to 100 meters
- hogshead = a British unit of capacity for alcoholic beverages
- homer = an ancient Hebrew unit of capacity equal to 10 baths or 10 ephahs
- Honduran monetary unit = monetary unit in Honduras
- Hong Kong dollar = the basic unit of money in Hong Kong
- horsepower = a unit of power equal to 746 watts
- horsepower-hour = a unit of work equal to the work done by one horsepower in one hour
- houseful = as many as a house will accommodate
- houseroom = space for accommodation in a house
- HP = a unit of power equal to 746 watts
- hryvnia = the basic unit of money in Ukraine
- Hubble constant = the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer
- Hubble parameter = the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer
- Hubble's constant = the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer
- Hubble's parameter = the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer
- hundred = ten 10s
- hundred thousand = the cardinal number that is the fifth power of ten
- hundredth = one part in a hundred equal parts
- hundredweight = a British unit of weight equivalent to 112 pounds / a United States unit of weight equivalent to 100 pounds / a unit of weight equal to 100 kilograms
- Hungarian monetary unit = monetary unit in Hungary
- I = the smallest whole number or a numeral representing this number
- Icelandic krona = the basic unit of money in Iceland
- Icelandic monetary unit = monetary unit in Iceland
- II = the cardinal number that is the sum of one and one or a numeral representing this number
- III = the cardinal number that is the sum of one and one and one
- illumination unit = a measure of illumination
- imaginary = a number of the form a+bi where a and b are real numbers and i is the square root of -1
- imaginary number = a number of the form a+bi where a and b are real numbers and i is the square root of -1
- imaginary part = the part of a complex number that has the square root of -1 as a factor
- imaginary part of a complex number = the part of a complex number that has the square root of -1 as a factor
- Imperial capacity unit = a unit of measure for capacity officially adopted in the British Imperial System
- Imperial gallon = a British imperial capacity measure (liquid or dry) equal to 4 quarts or 4.545 liters
- improper fraction = a fraction whose numerator is larger than the denominator
- in = a unit of length equal to one twelfth of a foot
- inch = a unit of length equal to one twelfth of a foot / a unit of measurement for advertising space
- increase = a quantity that is added
- indefinite quantity = an estimated quantity
- Indian monetary unit = monetary unit in India
- Indian rupee = the basic unit of money in India
- Indonesian monetary unit = monetary unit in Indonesia
- inductance unit = a measure of the property of an electric circuit by which an electromotive force is induced in it
- infinitude = an infinite quantity
- information measure = a system of measurement of information based on the probabilities of the events that convey information
- integer = any of the natural numbers (positive or negative) or zero
- international ampere = a former unit of electric current
- international candle = a former international unit of luminous intensity
- international mile = a unit of length equal to 1,760 yards or 5,280 feet
- international nautical mile = a unit of length used in navigation; exactly 1,852 meters
- International System = a complete metric system of units of measurement for scientists
- International System of Units = a complete metric system of units of measurement for scientists
- inti = the basic unit of money in Peru
- inundation = an overwhelming number or amount
- ionic charge = the charge on an ion is equal to a constant charge e multiplied by an integer from 1 to 15
- iota = a tiny or scarcely detectable amount
- Iranian dinar = 100 dinars equal 1 rial in Iran
- Iranian monetary unit = monetary unit in Iran
- Iranian rial = the basic unit of money in Iran
- Iraqi dinar = the basic unit of money in Iraq
- Iraqi monetary unit = monetary unit in Iraq
- Irish monetary unit = monetary unit in Eire
- Irish pound = formerly the basic unit of money in Ireland
- Irish punt = formerly the basic unit of money in Ireland
- irrational = a real number that cannot be expressed as a rational number
- irrational number = a real number that cannot be expressed as a rational number
- Israeli monetary unit = monetary unit in Israel
- Italian lira = formerly the basic unit of money in Italy
- Italian monetary unit = monetary unit in Italy
- IV = the cardinal number that is the sum of three and one
- Ivory Coast franc = the basic unit of money in the Ivory Coast
- IX = the cardinal number that is the sum of eight and one
- J = a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
- jack = a small worthless amount
- Jamaican dollar = the basic unit of money in Jamaica
- Japanese monetary unit = monetary unit in Japan
- jar = the quantity contained in a jar
- jarful = the quantity contained in a jar
- jiao = 10 jiao equal 1 yuan in China
- jillion = a very large indefinite number
- Jordanian dinar = the basic unit of money in Jordan
- Jordanian monetary unit = monetary unit in Jordan
- jot = a slight but appreciable amount
- joule = a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
- jug = the quantity contained in a jug
- jugful = the quantity contained in a jug
- K = a unit of information equal to 1024 bytes / a unit of information equal to 1000 bytes / the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites / the cardinal number that is the product of 10 and 100
- kapeika = 100 kapeikas equal 1 rubel in Belarus
- karat = the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold
- Kazakhstani monetary unit = monetary unit in Kazakhstan
- kB = a unit of information equal to 1024 bytes / a unit of information equal to 1000 bytes / a unit of information equal to 1000 bits
- kbit = a unit of information equal to 1000 bits
- keg = the quantity contained in a keg
- kegful = the quantity contained in a keg
- kelvin = the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites
- Kenyan monetary unit = monetary unit in Kenya
- Kenyan shilling = the basic unit of money in Kenya
- kettle = the quantity a kettle will hold
- kettleful = the quantity a kettle will hold
- key = a kilogram of a narcotic drug
- kg = one thousand grams
- khoum = 5 khoums equal 1 ouguiya in Mauritania
- KiB = a unit of information equal to 1024 bytes
- kibibit = a unit of information equal to 1024 bits
- kibibyte = a unit of information equal to 1024 bytes
- kibit = a unit of information equal to 1024 bits
- kilderkin = an obsolete British unit of capacity equal to 18 Imperial gallons
- kilo = one thousand grams
- kilobit = a unit of information equal to 1000 bits
- kilobyte = a unit of information equal to 1024 bytes / a unit of information equal to 1000 bytes
- kilocalorie = a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
- kilogram = one thousand grams
- kilogram calorie = a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
- kilogram-meter = a unit of work equal to the work done by a one kilogram force operating through a distance of one meter
- kiloliter = a metric unit of volume or capacity equal to 1000 liters
- kilolitre = a metric unit of volume or capacity equal to 1000 liters
- kilometer = a metric unit of length equal to 1000 meters
- kilometre = a metric unit of length equal to 1000 meters
- kiloton = a measure of explosive power (of an atomic weapon) equal to that of 1000 tons of TNT / one thousand tons
- kilovolt = a unit of potential equal to a thousand volts
- kilovolt-ampere = a unit of electrical power equal to 1000 volt-amperes
- kilowatt = a unit of power equal to 1000 watts
- kilowatt hour = a unit of energy equal to the work done by a power of 1000 watts operating for one hour
- kina = the basic unit of money in Papua New Guinea
- kip = the basic unit of money in Laos
- Kiribati dollar = the basic unit of money in Kiribati
- klick = a metric unit of length equal to 1000 meters
- km = a metric unit of length equal to 1000 meters
- kobo = 100 kobos equal 1 naira in Nigeria
- kopeck = 100 kopecks equal 1 ruble in Russia
- kopek = 100 kopecks equal 1 ruble in Russia
- kopiyka = 100 kopiykas equal 1 hryvnia in Ukraine
- kor = an ancient Hebrew unit of capacity equal to 10 baths or 10 ephahs
- koruna = the basic unit of money in Czech Republic / the basic unit of money in Slovakia
- kos = a unit of length having different values in different localities
- krona = the basic unit of money in Iceland / the basic unit of money in Sweden
- krone = the basic unit of money in Denmark / the basic unit of money in Norway
- kroon = the basic unit of money in Estonia
- kt = the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold
- kurus = 100 kurus equal 1 lira in Turkey
- Kuwaiti dinar = the basic unit of money in Kuwait
- Kuwaiti dirham = worth one tenth of a Kuwaiti dinar
- Kuwaiti monetary unit = monetary unit in Kuwait
- kV = a unit of potential equal to a thousand volts
- kW = a unit of power equal to 1000 watts
- kW-hr = a unit of energy equal to the work done by a power of 1000 watts operating for one hour
- kwacha = the basic unit of money in Malawi / the basic unit of money in Zambia
- kwai = the basic unit of money in China
- kwanza = the basic unit of money in Angola
- kyat = the basic unit of money in Myanmar
- Kyrgyzstani monetary unit = monetary unit in Kyrgyzstan
- l = a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions
- lakh = the cardinal number that is the fifth power of ten
- lambert = a cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter
- land mile = a unit of length equal to 1,760 yards or 5,280 feet
- langley = unit of solar radiation
- Laotian monetary unit = monetary unit in Laos
- lapful = the quantity that can be held in the lap
- large calorie = a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
- large indefinite amount = an indefinite quantity that is above the average in size or magnitude
- large indefinite quantity = an indefinite quantity that is above the average in size or magnitude
- large integer = an integer equal to or greater than ten
- large number = a large indefinite number
- lari = the basic unit of money in Georgia
- lashings = a large number or amount
- last = a unit of capacity for grain equal to 80 bushels / a unit of weight equal to 4,000 pounds
- lats = the basic unit of money in Latvia
- Latvian monetary unit = monetary unit in Latvia
- lb = 16 ounces avoirdupois
- lbf. = a nontechnical unit of force equal to the mass of 1 pound with an acceleration of free fall equal to 32 feet/sec/sec
- lea = a unit of length of thread or yarn
- lead = the score by which a team or individual is winning
- league = an obsolete unit of distance of variable length
- leash = the cardinal number that is the sum of one and one and one
- Lebanese monetary unit = monetary unit in Lebanon
- Lebanese pound = the basic unit of money in Lebanon
- lebensraum = space sought for occupation by a nation whose population is expanding
- lek = the basic unit of money in Albania
- lempira = the basic unit of money in Honduras
- leone = the basic unit of money in Sierra Leone
- lepton = 100 lepta equal 1 drachma in Greece
- Lesotho monetary unit = monetary unit in Lesotho
- leu = the basic unit of money in Romania / the basic unit of money in Moldova
- lev = the basic unit of money in Bulgaria
- li = Chinese distance measure
- Liberian dollar = the basic unit of money in Liberia
- Libyan dinar = the basic unit of money in Libya
- Libyan dirham = 100 dirhams equal 1 dinar in Libya
- Libyan monetary unit = monetary unit in Libya
- light hour = the distance light travels in a vacuum in one hour
- light minute = the distance light travels in a vacuum in one minute
- light second = the distance light travels in a vacuum in one second
- light unit = a measure of the visible electromagnetic radiation
- light year = the distance that light travels in a vacuum in 1 year
- light-year = the distance that light travels in a vacuum in 1 year
- ligne = a linear unit (1/40 inch) used to measure diameter of buttons
- likuta = 100 makuta equal 1 zaire in Zaire
- lilangeni = the basic unit of money in Swaziland
- limit = the greatest amount of something that is possible or allowed / the mathematical value toward which a function goes as the independent variable approaches infinity
- limit point = the mathematical value toward which a function goes as the independent variable approaches infinity
- limitation = the greatest amount of something that is possible or allowed
- linage = the number of lines in a piece of printed material
- line = space for one line of print (one column wide and 1/14 inch deep) used to measure advertising
- lineage = the number of lines in a piece of printed material
- linear measure = a unit of measurement of length
- linear unit = a unit of measurement of length
- link = a unit of length equal to 1/100 of a chain
- liquid measure = a unit of capacity for liquids
- liquid unit = a unit of capacity for liquids
- lira = formerly the basic unit of money in Italy; equal to 100 centesimi / the basic unit of money in Turkey / the basic unit of money on Malta
- litas = the basic unit of money in Lithuania
- liter = a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions
- Lithuanian monetary unit = monetary unit in Lithuania
- litre = a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions
- little = a small amount or duration
- Little Joe = the cardinal number that is the sum of three and one
- Little Phoebe = the cardinal number that is the sum of four and one
- living space = space sought for occupation by a nation whose population is expanding
- lm = a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
- load = an amount of alcohol sufficient to intoxicate / a quantity that can be processed or transported at one time
- loading = a quantity that can be processed or transported at one time
- loads = a large number or amount
- long dozen = the cardinal number that is the sum of twelve and one
- long hundred = the cardinal number that is the product of ten and twelve
- long hundredweight = a British unit of weight equivalent to 112 pounds
- long measure = a measure of length
- long ton = a British unit of weight equivalent to 2240 pounds
- loonie = the basic unit of money in Canada
- lot = a large number or amount or extent
- loti = the basic unit of money in Lesotho
- lots = a large number or amount
- love = a score of zero in tennis or squash
- lower limit = the smallest possible quantity
- lumen = a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
- luminance unit = a measure of luminance
- luminous flux unit = a measure of luminous flux per unit area
- luminous intensity unit = a measure of luminous intensity
- lumma = 100 lumma equal 1 dram in Armenia
- lux = a unit of illumination equal to 1 lumen per square meter
- Luxembourg franc = formerly the basic unit of money in Luxembourg
- lwei = 100 lwei equal 1 kwanza in Angola
- lx = a unit of illumination equal to 1 lumen per square meter
- LXX = the cardinal number that is the product of ten and seven
- LXXVIII = the cardinal number that is the sum of seventy and eight
- LXXX = the cardinal number that is the product of ten and eight
- M = a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes / a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes / the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards) / the cardinal number that is the product of 10 and 100
- mA = one thousandth of an ampere
- Macao monetary unit = monetary unit in Macao
- Madagascar franc = the basic unit of money in Madagascar
- magic number = the atomic number of an extra stable strongly bound atomic nucleus: 2, 8, 20, 28, 50, 82 or 126
- magnetic flux = a measure of the strength of a magnetic field over a given area
- magnetic flux unit = a measure of the strength of a magnetic field per unit area
- magnetisation = the extent or degree to which something is magnetized
- magnetization = the extent or degree to which something is magnetized
- magnetomotive force unit = a unit of measurement of magnetomotive force
- magneton = a unit of magnetic moment of a molecular or atomic or subatomic particle
- majority = more than half of the votes
- Malawi kwacha = the basic unit of money in Malawi
- Malawian monetary unit = monetary unit in Malawi
- Malaysian monetary unit = monetary unit is Malaysia
- Mali franc = the basic unit of money in Mali
- Maltese lira = the basic unit of money on Malta
- Maltese monetary unit = monetary unit on Malta
- manat = the basic unit of money in Azerbaijan / the basic unit of money in Turkmenistan
- marginal utility = the amount that utility increases with an increase of one unit of an economic good or service
- mark = formerly the basic unit of money in Germany
- markka = formerly the basic unit of money in Finland
- mass = a large number or amount or extent
- mass number = the sum of the number of neutrons and protons in an atomic nucleus
- mass unit = a unit of measurement for mass
- match = the score needed to win a match
- match point = the final point needed to win a match
- mate = one of a pair
- maund = a unit of weight used in Asia
- Mauritanian monetary unit = monetary unit in Mauritania
- Mauritian monetary unit = monetary unit in Mauritius
- Mauritian rupee = the basic unit of money in Mauritius
- maximum = the largest possible quantity
- maxwell = a cgs unit of magnetic flux equal to the flux perpendicular to an area of 1 square centimeter in a magnetic field of 1 gauss
- MB = a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes / a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes / a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits
- Mbit = a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits
- mcg = one millionth (1/1,000,000) gram
- measuring block = a unit of measurement
- measuring unit = a unit of measurement
- mebibit = a unit of information equal to 1024 kibibits or 2^20 (1,048,576) bits
- mebibyte = a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
- mediety = one of two (approximately) equal parts
- meg = the number that is represented as a one followed by 6 zeros
- megabit = a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits
- megabyte = a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes / a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes
- megaflop = a unit for measuring the speed of a computer system
- megaton = a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT / one million tons
- megawatt = a unit of power equal to one million watts
- megohm = a unit of resistance equal to one million ohms
- mesh = the number of openings per linear inch of a screen
- mess = a large number or amount or extent
- meter = the basic unit of length adopted under the Systeme International d'Unites
- metical = the basic unit of money in Mozambique
- metre = the basic unit of length adopted under the Systeme International d'Unites
- metric = a system of related measures that facilitates the quantification of some particular characteristic / a decimal unit of measurement of the metric system
- metric capacity unit = a capacity unit defined in metric terms
- metric grain = a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
- metric hundredweight = a unit of weight equal to 100 kilograms
- metric linear unit = a linear unit of distance in metric terms
- metric system = a decimal system of weights and measures based on the meter and the kilogram and the second
- metric ton = a unit of weight equivalent to 1000 kilograms
- metric unit = a decimal unit of measurement of the metric system
- metric weight unit = a decimal unit of weight based on the gram
- Mexican monetary unit = monetary unit in Mexico
- Mexican peso = the basic unit of money in Mexico
- MFLOP = a unit for measuring the speed of a computer system
- mg = one thousandth (1/1,000) gram
- mho = a unit of conductance equal to the reciprocal of an ohm
- mi = a unit of length equal to 1,760 yards or 5,280 feet; exactly 1609.344 meters / a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude / a former British unit of length equivalent to 6,080 feet
- MiB = a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
- Mibit = a unit of information equal to 1024 kibibits or 2^20 (1,048,576) bits
- mickle = a large number or amount or extent
- microbar = the absolute unit of pressure equal to one dyne per square centimeter
- microfarad = a unit of capacitance equal to one millionth of a farad
- microgauss = a unit of magnetic flux density equal to one millionth of a gauss
- microgram = one millionth (1/1,000,000) gram
- micrometer = a metric unit of length equal to one millionth of a meter
- micromicron = a metric unit of length equal to one trillionth of a meter
- micromillimeter = a metric unit of length equal to one billionth of a meter
- micromillimetre = a metric unit of length equal to one billionth of a meter
- micron = a metric unit of length equal to one millionth of a meter
- microradian = a unit of angular distance equal to one thousandth of a milliradian
- microvolt = a unit of potential equal to one millionth of a volt
- mil = an angular unit used in artillery; equal to 1/6400 of a complete revolution / a metric unit of volume equal to one thousandth of a liter / a unit of length equal to one thousandth of an inch
- mile = a unit of length equal to 1,760 yards or 5,280 feet; exactly 1609.344 meters / a Swedish unit of length equivalent to 10 km / an ancient Roman unit of length equivalent to 1620 yards / a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude / a former British unit of length equivalent to 6,080 feet (1,853.184 meters); 800 feet longer than a statute mile / a former British unit of length once used in navigation
- miler = the length of something in miles
- miles per gallon = the distance traveled in a vehicle powered by one gallon of gasoline or diesel fuel
- military pace = the length of a single step in marching
- millenary = a sum or aggregate of one thousand
- milliampere = one thousandth of an ampere
- milliard = a billion
- millibar = a unit of atmospheric pressure equal to one thousandth of a bar
- millicurie = a unit of radioactivity equal to one thousandth of a curie
- millidegree = a unit of temperature equal to one-thousandth of a degree
- millifarad = a unit of capacitance equal to one thousandth of a farad
- milligram = one thousandth (1/1,000) gram
- millihenry = a unit of inductance equal to one thousandth of a henry
- milliliter = a metric unit of volume equal to one thousandth of a liter
- millilitre = a metric unit of volume equal to one thousandth of a liter
- millime = 1,000 millimes equal 1 dinar in Tunisia
- millimeter = a metric unit of length equal to one thousandth of a meter
- millimeter of mercury = a unit of pressure equal to 0.001316 atmosphere
- millimetre = a metric unit of length equal to one thousandth of a meter
- millimicron = a metric unit of length equal to one billionth of a meter
- milline = an advertising measure
- million = the number that is represented as a one followed by 6 zeros / a very large indefinite number
- million floating point operations per second = a unit for measuring the speed of a computer system
- million instructions per second = a unit for measuring the execution speed of a computer's CPU
- millionth = one part in a million equal parts
- milliradian = a unit of angular distance equal to one thousandth of a radian
- millirem = a dosage of ionizing radiation equivalent to one thousandth (1/1000) of a rem
- millivolt = a unit of potential equal to one thousandth of a volt
- milliwatt = a unit of power equal to one thousandth of a watt
- minim = a United States liquid unit equal to 1/60 fluidram / a British imperial capacity measure (liquid or dry) equal to 1/60th fluid dram or 0.059194 cubic centimeters
- minimum = the smallest possible quantity
- mint = a large number or amount or extent
- minuend = the number from which the subtrahend is subtracted
- minute = a unit of angular distance equal to a 60th of a degree
- minute of arc = a unit of angular distance equal to a 60th of a degree
- MIPS = a unit for measuring the execution speed of a computer's CPU
- mite = a slight but appreciable amount
- ml = a metric unit of volume equal to one thousandth of a liter
- mm = a metric unit of length equal to one thousandth of a meter
- mm Hg = a unit of pressure equal to 0.001316 atmosphere
- modicum = a small or moderate or token amount
- modulus = a coefficient that expresses how much of a specified property is possessed by a specified substance / the absolute value of a complex number / an integer that can be divided without remainder into the difference between two other integers
- modulus of elasticity = the ratio of the applied stress to the change in shape of an elastic body
- modulus of rigidity = the coefficient of elasticity for a shearing force
- moiety = one of two (approximately) equal parts
- mol = the molecular weight of a substance expressed in grams
- Moldovan monetary unit = monetary unit in Moldova
- mole = the molecular weight of a substance expressed in grams
- monad = a singular metaphysical entity from which material properties are said to derive
- monas = a singular metaphysical entity from which material properties are said to derive
- monetary unit = a unit of money
- mongo = 100 mongo equal 1 tugrik in Mongolia
- Mongolian monetary unit = monetary unit in Mongolia
- morgen = a South African unit of measure equal to about 2 acres
- Moroccan dirham = the basic unit of money in Morocco
- Moroccan monetary unit = monetary unit in Morocco
- morsel = a small quantity of anything
- mountain = a large number or amount or extent
- mouthful = the quantity that can be held in the mouth
- Mozambique monetary unit = monetary unit in Mozambique
- mrem = a dosage of ionizing radiation equivalent to one thousandth (1/1000) of a rem
- MT = a unit of weight equivalent to 1000 kilograms
- much = a great amount or extent
- muckle = a large number or amount or extent
- mug = the quantity that can be held in a mug
- mugful = the quantity that can be held in a mug
- multiplicand = the number that is multiplied by the multiplier
- multiplier = the number by which a multiplicand is multiplied
- multiplier factor = the number by which a multiplicand is multiplied
- multitude = a large indefinite number
- mutchkin = a Scottish unit of liquid measure equal to 0.9 United States pint
- mutton quad = a quad with a square body
- mutual inductance = a measure of the induction between two circuits; the ratio of the electromotive force in a circuit to the corresponding change of current in a neighboring circuit
- mV = a unit of potential equal to one thousandth of a volt
- Mx = a cgs unit of magnetic flux equal to the flux perpendicular to an area of 1 square centimeter in a magnetic field of 1 gauss
- Myanmar monetary unit = monetary unit in the Union of Burma
- myg = one ten thousandth of a centner
- mym = a metric unit of length equal to 10,000 meters
- myriad = the cardinal number that is the product of ten and one thousand / a large indefinite number
- myriagram = one ten thousandth of a centner
- myriameter = a metric unit of length equal to 10,000 meters
- myriametre = a metric unit of length equal to 10,000 meters
- N = concentration expressed in gram equivalents of solute per liter / a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram
- nada = a quantity of no importance
- nail = a former unit of length for cloth equal to 1/16 of a yard
- naira = the basic unit of money in Nigeria
- nanogram = one billionth (1/1,000,000,000) gram
- nanometer = a metric unit of length equal to one billionth of a meter
- nanometre = a metric unit of length equal to one billionth of a meter
- nanovolt = a unit of potential equal to one billionth of a volt
- natural number = the number 1 and any other number obtained by adding 1 to it repeatedly
- naught = a quantity of no importance
- naut mi = a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude / a former British unit of length equivalent to 6,080 feet
- nautical chain = a nautical unit of length
- nautical linear unit = a linear unit of distance used in navigation
- nautical mile = a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude / a former British unit of length equivalent to 6,080 feet
- neighborhood = the approximate amount of something
- Nepalese monetary unit = monetary unit in Nepal
- Nepalese rupee = the basic unit of money in Nepal
- net ton = a United States unit of weight equivalent to 2000 pounds
- New Zealand dollar = the basic unit of money in New Zealand
- newton = a unit of force equal to the force that imparts an acceleration of 1 m/sec/sec to a mass of 1 kilogram
- ng = one billionth (1/1,000,000,000) gram
- ngultrum = the basic unit of money in Bhutan
- ngwee = 100 ngwee equal 1 kwacha in Zambia
- nibble = a small byte
- Nicaraguan monetary unit = monetary unit in Nicaragua
- Niger franc = the basic unit of money in Niger
- Nigerian monetary unit = monetary unit in Nigeria
- nihil = nil
- nil = a quantity of no importance
- Nina from Carolina = the cardinal number that is the sum of eight and one
- nine = the cardinal number that is the sum of eight and one
- niner = the cardinal number that is the sum of eight and one
- nineteen = the cardinal number that is the sum of eighteen and one
- ninety = the cardinal number that is the product of ten and nine
- ninth = one part in nine equal parts
- nip = a small drink of liquor
- nit = a luminance unit equal to 1 candle per square meter measured perpendicular to the rays from the source
- nix = a quantity of no importance
- nm = a metric unit of length equal to one billionth of a meter
- no. = the number designating place in an ordered sequence
- normality = concentration expressed in gram equivalents of solute per liter
- North Korean monetary unit = monetary unit in North Korea
- North Korean won = the basic unit of money in North Korea
- Norwegian krone = the basic unit of money in Norway
- Norwegian monetary unit = monetary unit in Norway
- nose = a small distance
- nothing = a quantity of no importance
- nought = a mathematical element that when added to another number yields the same number
- nucleon number = the sum of the number of neutrons and protons in an atomic nucleus
- null = a quantity of no importance
- number = a concept of quantity involving zero and units
- number 1 = the first element in a countable series
- number one = the first element in a countable series
- numerator = the dividend of a fraction
- numerical value = a real number regardless of its sign
- nut = half the width of an em
- nutritionist's calorie = a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure
- nybble = a small byte
- obolus = a Greek unit of weight equal to one tenth of a gram
- ocean = anything apparently limitless in quantity or volume
- octad = the cardinal number that is the sum of seven and one
- octal digit = a digit from 0 to 7 in octal notation
- octane number = a measure of the antiknock properties of gasoline
- octane rating = a measure of the antiknock properties of gasoline
- octet = the cardinal number that is the sum of seven and one
- octillion = the number that is represented as a one followed by 27 zeros
- octonary = the cardinal number that is the sum of seven and one
- oersted = the magnetic field strength 1 cm from a unit magnetic pole
- ogdoad = the cardinal number that is the sum of seven and one
- ohm = a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere
- oka = a Turkish liquid unit equal to 1.3 pints / a Turkish unit of weight equal to about 2.75 pounds
- Omani monetary unit = monetary unit in Oman
- Omani rial = the basic unit of money in Oman
- one = the smallest whole number or a numeral representing this number
- one C = ten 10s
- one million million = the number that is represented as a one followed by 12 zeros
- one million million million = the number that is represented as a one followed by 18 zeros
- one percent = one part in a hundred equal parts
- one thousand = the cardinal number that is the product of 10 and 100
- one thousand million = the number that is represented as a one followed by 9 zeros
- one thousand thousand = the number that is represented as a one followed by 6 zeros
- one-billionth = one part in a billion equal parts
- one-eighth = one part in eight equal parts
- one-fifth = one part in five equal parts
- one-fourth = one of four equal parts
- one-half = one of two equal parts of a divisible whole
- one-hundred-millionth = one part in a hundred million equal parts
- one-hundred-thousandth = one part in a hundred thousand equal parts
- one-hundredth = one part in a hundred equal parts
- one-millionth = one part in a million equal parts
- one-ninth = one part in nine equal parts
- one-quadrillionth = one part in a quadrillion equal parts
- one-quarter = one of four equal parts
- one-quintillionth = one part in a quintillion equal parts
- one-seventh = one part in seven equal parts
- one-sixteenth = one part in sixteen equal parts
- one-sixth = one part in six equal parts
- one-sixtieth = one part in sixty equal parts
- one-sixty-fourth = one part in sixty-four equal parts
- one-ten-thousandth = one part in ten thousand equal parts
- one-tenth = a tenth part
- one-third = one of three equal parts of a divisible whole
- one-thirty-second = one part in thirty-two equal parts
- one-thousandth = one part in a thousand equal parts
- one-trillionth = one part in a trillion equal parts
- one-twelfth = one part in twelve equal parts
- oodles = a large number or amount
- ordinal = the number designating place in an ordered sequence
- ordinal number = the number designating place in an ordered sequence
- ore = a monetary subunit in Denmark and Norway and Sweden
- ouguiya = the basic unit of money in Mauritania
- ounce = a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams / a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound
- outage = the amount of something (as whiskey or oil) lost in storage or transportation
- output = the quantity of something (as a commodity) that is created
- oxidation number = the degree of oxidation of an atom or ion or molecule
- oxidation state = the degree of oxidation of an atom or ion or molecule
- oxtant = a unit of angular distance equal to half a quadrant
- oz. = a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
- Pa = a unit of pressure equal to one newton per square meter
- pa'anga = the basic unit of money in Tonga
- pace = a unit of length equal to 3 feet; defined as 91.44 centimeters
- pack = a large indefinite number
- pail = the quantity contained in a pail
- pailful = the quantity contained in a pail
- pain unit = a unit measuring the intensity of pain
- pair = two items of the same kind
- paisa = a fractional monetary unit in Bangladesh and India and Nepal and Pakistan
- Pakistani monetary unit = monetary unit in Pakistan
- Pakistani rupee = the basic unit of money in Pakistan
- palm = a linear unit based on the length or width of the human hand
- Panamanian monetary unit = monetary unit in Panama
- Papuan monetary unit = monetary unit in Papua New Guinea
- par = the standard number of strokes set for each hole on a golf course, or for the entire course
- para = 100 para equal 1 dinar in Yugoslavia
- Paraguayan monetary unit = monetary unit in Paraguay
- parity = a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's
- parity bit = a bit that is used in an error detection procedure in which a 0 or 1 is added to each group of bits so that it will have either an odd number of 1's or an even number of 1's
- parking = space in which vehicles can be parked
- parsec = a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc
- partition = the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit
- pascal = a unit of pressure equal to one newton per square meter
- passel = a large number or amount or extent
- pataca = the basic unit of money in Macao
- PB = a unit of information equal to 1024 tebibytes or 2^50 bytes / a unit of information equal to 1000 terabytes or 10^15 bytes / a unit of information equal to 1000 terabits or 10^15 bits
- Pbit = a unit of information equal to 1000 terabits or 10^15 bits
- pdl = a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound
- peak = the most extreme possible amount or value
- pebibit = a unit of information equal to 1024 tebibits or 2^50 bits
- pebibyte = a unit of information equal to 1024 tebibytes or 2^50 bytes
- peck = a United States dry measure equal to 8 quarts or 537.605 cubic inches / a British imperial capacity measure (liquid or dry) equal to 2 gallons / (often followed by `of') a large number or amount or extent
- pengo = formerly the basic unit of money in Hungary until it was replaced by the forint in 1946
- penn'orth = the amount that can be bought for a penny
- penni = 100 pennia formerly equaled 1 markka in Finland
- penny = a fractional monetary unit of Ireland and the United Kingdom
- pennyweight = a unit of apothecary weight equal to 24 grains
- pennyworth = the amount that can be bought for a penny
- pentad = the cardinal number that is the sum of four and one
- perch = a square rod of land / a linear measure of 16.5 feet
- Peruvian monetary unit = monetary unit in Peru
- peseta = formerly the basic unit of money in Spain
- pesewa = 100 pesewas equal 1 cedi in Ghana
- peso = the basic unit of money in Chile; equal to 100 centesimos / the basic unit of money in Colombia; equal to 100 centavos / the basic unit of money in Cuba; equal to 100 centavos / the basic unit of money in the Dominican Republic; equal to 100 centavos / the basic unit of money in Guinea-Bissau; equal to 100 centavos / the basic unit of money in Mexico; equal to 100 centavos / the basic unit of money in the Philippines; equal to 100 centavos / the basic unit of money in Uruguay
- petabit = a unit of information equal to 1000 terabits or 10^15 bits
- petabyte = a unit of information equal to 1024 tebibytes or 2^50 bytes / a unit of information equal to 1000 terabytes or 10^15 bytes
- pfennig = 100 pfennigs formerly equaled 1 Deutsche Mark in Germany
- Philippine monetary unit = monetary unit in the Philippines
- Philippine peso = the basic unit of money in the Philippines
- Phoebe = the cardinal number that is the sum of four and one
- phon = a unit of subjective loudness
- phot = a unit of illumination equal to 1 lumen per square centimeter
- pi = the ratio of the circumference to the diameter of a circle
- piaster = 100 kurus equal 1 lira in Turkey / a fractional monetary unit in Egypt and Lebanon and Sudan and Syria
- piastre = 100 kurus equal 1 lira in Turkey / a fractional monetary unit in Egypt and Lebanon and Sudan and Syria
- PiB = a unit of information equal to 1024 tebibytes or 2^50 bytes
- Pibit = a unit of information equal to 1024 tebibits or 2^50 bits
- pica = a linear unit (1/6 inch) used in printing
- pica em = a linear unit (1/6 inch) used in printing
- pick = the quantity of a crop that is harvested
- picking = the quantity of a crop that is harvested
- picofarad = a unit of capacitance equal to one trillionth of a farad
- picometer = a metric unit of length equal to one trillionth of a meter
- picometre = a metric unit of length equal to one trillionth of a meter
- picovolt = a unit of potential equal to one trillionth of a volt
- picul = a unit of weight used in some parts of Asia
- pile = a large number or amount or extent
- piles = a large number or amount
- pinch = a slight but appreciable amount
- pint = a United States liquid unit equal to 16 fluid ounces
- pipeful = the quantity of tobacco that can be smoked in a pipe at one time
- pitcher = the quantity contained in a pitcher
- pitcherful = the quantity contained in a pitcher
- Planck's constant = the constant of proportionality relating the energy of a photon to its frequency
- plate = the quantity contained in a plate
- plateful = the quantity contained in a plate
- plenty = a large number or amount or extent
- plurality = the number of votes for the candidate or party receiving the greatest number (but less that half of the votes) / a large indefinite number
- pocketful = the quantity a pocket will hold
- point = the unit of counting in scoring a game or contest / a linear unit used to measure the size of type
- point of accumulation = the mathematical value toward which a function goes as the independent variable approaches infinity
- point system = a system of graduating sizes of type in multiples of the point
- poise = a cgs unit of dynamic viscosity equal to one dyne-second per square centimeter
- pole = a square rod of land / a linear measure of 16.5 feet
- Polish monetary unit = monetary unit in Poland
- pollen count = the number of pollen grains (usually ragweed) in a standard volume of air over a twenty-four hour period and a specified time and place
- pood = a Russian unit of weight equal to approximately 36 pounds
- population = the number of inhabitants (either the total number or the number of a particular race or class) in a given place
- Portuguese escudo = formerly the basic monetary unit of Portugal
- Portuguese monetary unit = monetary unit in Portugal
- pot = the quantity contained in a pot / (often followed by `of') a large number or amount or extent
- potential unit = a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point
- potful = the quantity contained in a pot
- pound = a nontechnical unit of force equal to the mass of 1 pound with an acceleration of free fall equal to 32 feet/sec/sec / the basic unit of money in Great Britain and Northern Ireland; equal to 100 pence / the basic unit of money in Cyprus; equal to 100 cents / the basic unit of money in Egypt; equal to 100 piasters / formerly the basic unit of money in Ireland; equal to 100 pence / the basic unit of money in Lebanon; equal to 100 piasters / the basic unit of money in the Sudan; equal to 100 piasters / the basic unit of money in Syria
- pound sterling = the basic unit of money in Great Britain and Northern Ireland
- poundal = a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound
- pounder = something weighing a given number of pounds
- pounds per square inch = a unit of pressure
- power unit = a measure of electric power
- precipitation = the quantity of water falling to earth at a specific place within a specified period of time
- pressure unit = a unit measuring force per unit area
- prime = a natural number that has exactly two distinct natural number divisors: 1 and itself
- prime factor = the prime factors of a quantity are all of the prime quantities that will exactly divide the given quantity
- prime number = an integer that has no integral factors but itself and 1
- prime quantity = a natural number that has exactly two distinct natural number divisors: 1 and itself
- printing unit = a unit of measurement for printing
- production = the quantity of something (as a commodity) that is created
- proof = a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present
- proper fraction = a fraction with a numerator smaller than the denominator
- psi = a unit of pressure
- pul = 100 puls equal 1 afghani in Afghanistan
- pula = the basic unit of money in Botswana
- pulmonary reserve = the additional volume of air that the lungs can inhale and exhale when breathing to the limit of capacity in times of stress
- punt = formerly the basic unit of money in Ireland
- pure imaginary number = an imaginary number of the form a+bi where a is 0
- pya = 100 pyas equal 1 kyat in Myanmar
- Qatari dirham = 100 dirhams equal 1 riyal in Qatar
- Qatari monetary unit = monetary unit in Qatar
- Qatari riyal = the basic unit of money in Qatar
- qepiq = 100 qepiq equal 1 manat in Azerbaijan
- qindarka = 100 qindarka equal 1 lek in Albania
- qintar = 100 qindarka equal 1 lek in Albania
- quadrillion = the number that is represented as a one followed by 15 zeros / the number that is represented as a one followed by 24 zeros
- quadrillionth = one part in a quadrillion equal parts
- quadruplet = the cardinal number that is the sum of three and one
- quantity unit = a measure of the quantity of electricity
- quart = a United States liquid unit equal to 32 fluid ounces
- quarter = a quarter of a hundredweight (28 pounds) / a quarter of a hundredweight (25 pounds) / one of four equal parts
- quarter mile = a unit of length equal to a quarter of 1 mile
- quarter pound = 4 ounces avoirdupois
- quarter section = a land unit equal to a quarter of a section (160 acres) and measuring 1/2 mile on a side
- quartern = one of four equal parts
- quartet = the cardinal number that is the sum of three and one
- quartic = an algebraic equation or function of the fourth degree
- quatern = the cardinal number that is the sum of three and one
- quaternary = the cardinal number that is the sum of three and one
- quaternion = the cardinal number that is the sum of three and one
- quaternity = the cardinal number that is the sum of three and one
- quetzal = the basic unit of money in Guatemala
- quid = the basic unit of money in Great Britain and Northern Ireland
- quint = the cardinal number that is the sum of four and one
- quintal = a United States unit of weight equivalent to 100 pounds / a unit of weight equal to 100 kilograms
- quintet = the cardinal number that is the sum of four and one
- quintillion = the number that is represented as a one followed by 18 zeros
- quintillionth = one part in a quintillion equal parts
- quintuplet = the cardinal number that is the sum of four and one
- quire = a quantity of paper
- quite a little = a large number or amount or extent
- quota = a prescribed number
- quotient = the number obtained by division
- qurush = 20 qurush equal 1 riyal in Saudi Arabia
- R = the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole / a unit of radiation exposure
- rad = the unit of plane angle adopted under the Systeme International d'Unites
- radian = the unit of plane angle adopted under the Systeme International d'Unites
- radical = a quantity expressed as the root of another quantity
- radioactivity unit = a measure of radioactivity
- radix = the positive integer that is equivalent to one in the next higher counting place
- raft = a large number or amount or extent
- rafts = a large number or amount
- rand = the basic unit of money in South Africa
- Rankine = a unit of temperature on the Rankine scale
- rational = an integer or a fraction
- rational number = an integer or a fraction
- real = the basic unit of money in Brazil
- real number = any rational or irrational number
- ream = a quantity of paper; 480 or 500 sheets
- reciprocal ohm = a unit of conductance equal to the reciprocal of an ohm
- record = the number of wins versus losses and ties a team has had
- recurring decimal = a decimal with a sequence of digits that repeats itself indefinitely
- reflectance = the fraction of radiant energy that is reflected from a surface
- reflection factor = the fraction of radiant energy that is reflected from a surface
- reflectivity = the fraction of radiant energy that is reflected from a surface
- region = the approximate amount of something
- relative majority = the number of votes for the candidate or party receiving the greatest number
- relative quantity = a quantity relative to some purpose
- rem = the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays
- remainder = the number that remains after subtraction
- repeating decimal = a decimal with a sequence of digits that repeats itself indefinitely
- reserve = potential capacity to respond in order to maintain vital functions
- reservoir = a large or extra supply of something
- resistance unit = the reciprocal of conductance
- rial = the basic unit of money in Iran / the basic unit of money in Oman / the basic unit of money in Yemen
- riel = the basic unit of money in Cambodia
- ringgit = the basic unit of money in Malaysia
- riyal = the basic unit of money in Qatar / the basic unit of money in Saudi Arabia
- riyal-omani = the basic unit of money in Oman
- rod = a square rod of land / a linear measure of 16.5 feet
- roentgen = a unit of radiation exposure
- Roman mile = an ancient Roman unit of length equivalent to 1620 yards
- Roman pace = an ancient Roman unit of length (4.85 English feet) measured as the distance from the heel of one foot to the heel of the same foot when next it touches the ground
- Romanian monetary unit = monetary unit in Romania
- room = space for movement
- roomful = the quantity a room will hold
- root = a number that, when multiplied by itself some number of times, equals a given number
- rotl = a unit of weight used in some Moslem countries near the Mediterranean
- rouble = the basic unit of money in Russia
- rubel = the basic unit of money in Belarus
- ruble = the basic unit of money in Russia / the basic unit of money in Tajikistan
- run = the production achieved during a continuous period of operation
- rupee = the basic unit of money in India; equal to 100 paise / the basic unit of money in Pakistan; equal to 100 paisa / the basic unit of money in Mauritius; equal to 100 cents / the basic unit of money in Nepal; equal to 100 paisa / the basic unit of money in Seychelles; equal to 100 cents / the basic unit of money in Sri Lanka
- rupiah = the basic unit of money in Indonesia
- Russian monetary unit = monetary unit in Russia
- rutherford = a unit strength of a radioactive source equal to one million disintegrations per second
- Rwanda franc = the basic unit of money in Rwanda
- rydberg = a wave number characteristic of the wave spectrum of each element
- rydberg constant = a wave number characteristic of the wave spectrum of each element
- rydberg unit = a wave number characteristic of the wave spectrum of each element
- S = a unit of conductance equal to the reciprocal of an ohm
- s.t.p. = standard temperature and pressure
- sabin = a unit of acoustic absorption equivalent to the absorption by a square foot of a surface that absorbs all incident sound
- sack = the quantity contained in a sack
- sackful = the quantity contained in a sack
- santims = 100 santimi equal 1 lats in Latvia
- Sao Thome e Principe monetary unit = monetary unit on Sao Tome e Principe
- satang = 100 satangs equal 1 baht in Thailand
- Saudi Arabian monetary unit = monetary unit in Saudi Arabia
- Saudi Arabian riyal = the basic unit of money in Saudi Arabia
- scads = a large number or amount
- scale factor = a number used as a multiplier in scaling
- scattering = a small number (of something) dispersed haphazardly
- schilling = formerly the basic unit of money in Austria
- schtick = a little
- schtickl = a really little shtik
- schtik = a little
- schtikl = a really little shtik
- scintilla = a tiny or scarcely detectable amount
- scoop = the quantity a scoop will hold
- scoopful = the quantity a scoop will hold
- score = a number that expresses the accomplishment of a team or an individual in a game or contest
- scores = a large number or amount
- scruple = a unit of apothecary weight equal to 20 grains
- sea = anything apparently limitless in quantity or volume
- sea mile = a former British unit of length once used in navigation
- sea room = space for maneuver at sea
- second = a 60th part of a minute of arc
- second power = the product of two equal terms
- secpar = a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc
- section = a land unit equal to 1 square mile
- sector = the minimum track length that can be assigned to store information
- self-inductance = the ratio of the electromotive force produced in a circuit by self-induction to the rate of change of current producing it, expressed in henries
- sen = a fractional monetary unit of Japan and Indonesia and Cambodia
- sene = 100 sene equal 1 tala in Western Samoa
- Senegalese franc = the basic unit of money in Senegal
- seniti = 100 seniti equal 1 pa'anga in Tonga
- sent = 100 senti equal 1 kroon in Estonia
- sente = 100 lisente equal 1 loti in Lesotho
- septenary = the cardinal number that is the sum of six and one
- septet = the cardinal number that is the sum of six and one
- septillion = the number that is represented as a one followed by 24 zeros
- sestet = the cardinal number that is the sum of five and one
- set point = the final point needed to win a set in tennis
- seven = the cardinal number that is the sum of six and one
- sevener = the cardinal number that is the sum of six and one
- seventeen = the cardinal number that is the sum of sixteen and one
- seventh = one part in seven equal parts
- seventy = the cardinal number that is the product of ten and seven
- seventy-eight = the cardinal number that is the sum of seventy and eight
- sextant = a unit of angular distance equal to 60 degrees
- sextet = the cardinal number that is the sum of five and one
- sextillion = the number that is represented as a one followed by 21 zeros
- sextuplet = the cardinal number that is the sum of five and one
- Seychelles monetary unit = monetary unit in Seychelles
- Seychelles rupee = the basic unit of money in Seychelles
- shade = a slight amount or degree of difference
- shekel = the basic unit of money in Israel
- shelfful = the amount that a shelf will hold
- shilling = a former monetary unit in Great Britain / the basic unit of money in Kenya; equal to 100 cents / the basic unit of money in Somalia; equal to 100 cents / the basic unit of money in Tanzania; equal to 100 cents / the basic unit of money in Uganda
- shipload = the amount of cargo that can be held by a boat or ship or a freight car
- shit = a small worthless amount
- shoe string = a small amount of money
- shoeful = the amount that a shoe will hold
- shoestring = a small amount of money
- short hundredweight = a United States unit of weight equivalent to 100 pounds
- short ton = a United States unit of weight equivalent to 2000 pounds
- shot = a small drink of liquor
- shovel = the quantity a shovel can hold
- shovelful = the quantity a shovel can hold
- shred = a tiny or scarcely detectable amount
- shtick = a little
- shtickl = a really little shtik
- shtik = a little
- shtikl = a really little shtik
- SI = a complete metric system of units of measurement for scientists
- SI system = a complete metric system of units of measurement for scientists
- SI unit = a complete metric system of units of measurement for scientists
- siemens = a unit of conductance equal to the reciprocal of an ohm
- Sierra Leone monetary unit = monetary unit in Sierra Leone
- sight = a large number or amount or extent
- significant digit = any digit of a number that is known with certainty
- significant figure = any digit of a number that is known with certainty
- simple fraction = the quotient of two integers
- Singapore dollar = the basic unit of money in Singapore
- single = the smallest whole number or a numeral representing this number
- singleton = a single object
- sise = the cardinal number that is the sum of five and one
- six = the cardinal number that is the sum of five and one
- sixer = the cardinal number that is the sum of five and one
- sixteen = the cardinal number that is the sum of fifteen and one
- sixteenth = one part in sixteen equal parts
- sixteenth part = one part in sixteen equal parts
- sixth = one part in six equal parts
- sixtieth = one part in sixty equal parts
- sixty = the cardinal number that is the product of ten and six
- sixty-fourth = one part in sixty-four equal parts
- skeleton = something reduced to its minimal form
- skepful = the quantity a skep can hold
- skinful = a quantity of alcoholic drink sufficient to make you drunk
- slew = a large number or amount or extent
- slews = a large number or amount
- Slovakian monetary unit = monetary unit in Slovakia
- slug = a unit of mass equal to the mass that accelerates at 1 foot/sec/sec when acted upon by a force of 1 pound
- small calorie = unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure
- small fortune = a large sum of money
- small indefinite amount = an indefinite quantity that is below average size or magnitude
- small indefinite quantity = an indefinite quantity that is below average size or magnitude
- smattering = a small number or amount
- smidge = a tiny or scarcely detectable amount
- smidgen = a tiny or scarcely detectable amount
- smidgeon = a tiny or scarcely detectable amount
- smidgin = a tiny or scarcely detectable amount
- snake eyes = expressions used when when two dice are thrown and both come up showing one spot
- snuff = a pinch of smokeless tobacco inhaled at a single time
- solubility = the quantity of a particular substance that can dissolve in a particular solvent
- som = the basic unit of money in Kyrgyzstan / the basic unit of money in Uzbekistan
- Somalian monetary unit = monetary unit in Somalia
- Somalian shilling = the basic unit of money in Somalia
- sone = a unit of perceived loudness equal to the loudness of a 1000-hertz tone at 40 dB above threshold
- sound unit = any acoustic unit of measurement
- soupcon = a slight but appreciable amount
- South African monetary unit = monetary unit in South Africa
- South Korean monetary unit = monetary unit in South Korea
- South Korean won = the basic unit of money in South Korea
- spadeful = the quantity a shovel can hold
- span = a unit of length based on the width of the expanded human hand (usually taken as 9 inches) / two items of the same kind
- Spanish monetary unit = monetary unit in Spain
- Spanish peseta = formerly the basic unit of money in Spain
- spark = a small but noticeable trace of some quality that might become stronger
- spate = a large number or amount or extent
- speck = a slight but appreciable amount
- sperm count = the number of sperm in an ejaculate
- spillage = the amount that has spilled
- splash = a small quantity of something moist or liquid
- splatter = a small quantity of something moist or liquid
- split = a bottle containing half the usual amount
- spoilage = the amount that has spoiled
- spoon = as much as a spoon will hold
- spoonful = as much as a spoon will hold
- spot = a small piece or quantity of something
- spray = a quantity of small objects flying through the air
- spraying = a quantity of small objects flying through the air
- sprinkling = a small number (of something) dispersed haphazardly
- sq ft = a unit of area equal to one foot by one foot square
- sq in = a unit of area equal to one inch by one inch square
- sq yd = a unit of area equal to one yard by one yard square
- square = the product of two equal terms
- square foot = a unit of area equal to one foot by one foot square
- square inch = a unit of area equal to one inch by one inch square
- square measure = a system of units used to measure areas
- square meter = a centare is 1/100th of an are
- square metre = a centare is 1/100th of an are
- square mile = an area of 640 acres
- square root = a number that when multiplied by itself equals a given number
- square yard = a unit of area equal to one yard by one yard square
- squat = a small worthless amount
- sr = the unit of solid angle adopted under the Systeme International d'Unites
- Sri Lanka rupee = the basic unit of money in Sri Lanka
- Sri Lankan monetary unit = monetary unit in Sri Lanka
- stack = a large number or amount or extent
- stacks = a large number or amount
- standard = a board measure = 1980 board feet
- standard atmosphere = a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
- standard candle = the basic unit of luminous intensity adopted under the Systeme International d'Unites
- standard pressure = a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
- standard temperature = exactly zero degrees centigrade
- stat mi = a unit of length equal to 1,760 yards or 5,280 feet
- statute mile = a unit of length equal to 1,760 yards or 5,280 feet
- step = the distance covered by a step / a short distance
- steradian = the unit of solid angle adopted under the Systeme International d'Unites
- sthene = a unit of force equal to 1000 newtons
- stone = an avoirdupois unit used to measure the weight of a human body
- stone's throw = a short distance
- stotinka = 100 stotinka equal 1 lev in Bulgaria
- STP = standard temperature and pressure
- straight angle = an angle of 180 degrees
- stride = the distance covered by a step
- stroke = the unit of scoring in golf is the act of hitting the ball with a club
- subtrahend = the number to be subtracted from the minuend
- subunit = a monetary unit that is valued at a fraction (usually one hundredth) of the basic monetary unit
- sucre = the basic unit of money in Ecuador
- Sudanese monetary unit = monetary unit in the Sudan
- Sudanese pound = the basic unit of money in the Sudan
- sufficiency = an adequate quantity
- suggestion = a just detectable amount
- supply = an amount of something available for use
- Surinamese monetary unit = monetary unit in Suriname
- survey mile = a U.S. unit of measure equal to 1609.347 meters
- swath = the space created by the swing of a scythe or the cut of a mowing machine
- Swaziland monetary unit = monetary unit in Swaziland
- Swedish krona = the basic unit of money in Sweden
- Swedish mile = a Swedish unit of length equivalent to 10 km
- Swedish monetary unit = monetary unit in Sweden
- sweet Fanny Adams = little or nothing at all
- Swiss franc = the basic unit of money in Switzerland
- Syrian monetary unit = monetary unit in Syria
- Syrian pound = the basic unit of money in Syria
- system of measurement = a system of related measures that facilitates the quantification of some particular characteristic
- system of weights = a system of units used to express the weight of something
- system of weights and measures = system of measurement for length and weight and duration
- Systeme International = a complete metric system of units of measurement for scientists
- Systeme International d'Unites = a complete metric system of units of measurement for scientists
- t = a unit of weight equivalent to 1000 kilograms
- tablespoon = as much as a tablespoon will hold
- tablespoonful = as much as a tablespoon will hold
- tad = a slight amount or degree of difference
- tael = a unit of weight used in east Asia approximately equal to 1.3 ounces
- Taiwan dollar = the basic unit of money in Taiwan
- Tajikistani monetary unit = monetary unit in Tajikistan
- taka = the basic unit of money in Bangladesh
- tala = the basic unit of money in Western Samoa
- tambala = 100 tambala equal 1 kwacha in Malawi
- tanga = 100 tanga equal 1 Tajikistani ruble
- tank = as much as a tank will hold
- tankage = the quantity contained in (or the capacity of) a tank or tanks
- tankful = as much as a tank will hold
- Tanzanian monetary unit = monetary unit in Tanzania
- Tanzanian shilling = the basic unit of money in Tanzania
- TB = a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes / a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes / a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits
- Tbit = a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits
- teacup = as much as a teacup will hold
- teacupful = as much as a teacup will hold
- teaspoon = as much as a teaspoon will hold
- teaspoonful = as much as a teaspoon will hold
- tebibit = a unit of information equal to 1024 gibibits or 2^40 (1,099,511,627,776) bits
- tebibyte = a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes
- teens = all the numbers that end in -teen
- telephone unit = a unit of measurement for telephone use
- temperature unit = a unit of measurement for temperature
- ten = the cardinal number that is the sum of nine and one
- ten percent = a tenth part
- ten thousand = the cardinal number that is the product of ten and one thousand
- ten-thousandth = one part in ten thousand equal parts
- tenge = the basic unit of money in Kazakhstan / 100 tenge equal 1 manat in Turkmenistan
- tenner = the cardinal number that is the sum of nine and one
- tenth = a tenth part
- tenth part = a tenth part
- terabit = a unit of information equal to 1000 gigabits or 10^12 (1,000,000,000,000) bits
- terabyte = a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes / a unit of information equal to 1000 gigabytes or 10^12 (1,000,000,000,000) bytes
- teraflop = a unit for measuring the speed of a computer system
- tercet = the cardinal number that is the sum of one and one and one
- ternary = the cardinal number that is the sum of one and one and one
- ternion = the cardinal number that is the sum of one and one and one
- terzetto = the cardinal number that is the sum of one and one and one
- tesla = a unit of magnetic flux density equal to one weber per square meter
- tetrad = the cardinal number that is the sum of three and one
- tetri = 100 tetri equal 1 lari in Georgia
- Thai monetary unit = monetary unit in Thailand
- thebe = 100 thebe equal 1 pula in Botswana
- therm = a unit of heat equal to 100,000 British thermal units
- thimble = as much as a thimble will hold
- thimbleful = as much as a thimble will hold
- third = one of three equal parts of a divisible whole
- third power = the product of three equal terms
- thirteen = the cardinal number that is the sum of twelve and one
- thirty = the cardinal number that is the product of ten and three
- thirty-second = one part in thirty-two equal parts
- thirty-second part = one part in thirty-two equal parts
- thou = the cardinal number that is the product of 10 and 100
- thousand = the cardinal number that is the product of 10 and 100
- thousandth = one part in a thousand equal parts
- three = the cardinal number that is the sum of one and one and one
- three-fourths = three of four equal parts
- three-quarters = three of four equal parts
- threesome = the cardinal number that is the sum of one and one and one
- TiB = a unit of information equal to 1024 gibibytes or 2^40 (1,099,511,627,776) bytes
- Tibit = a unit of information equal to 1024 gibibits or 2^40 (1,099,511,627,776) bits
- tical = the basic unit of money in Thailand
- tidy sum = a large number or amount or extent
- tierce = one of three equal parts of a divisible whole / the cardinal number that is the sum of one and one and one
- time-scale factor = the ratio of the simulation time to the time of the real process
- tinge = a slight but appreciable amount
- tint = a just detectable amount
- tittle = a tiny or scarcely detectable amount
- tiyin = 100 tiyin equal 1 tenge in Kazakhstan / 100 tiyin equal 1 som in Uzbekistan
- tod = a unit of weight for wool equal to about 28 pounds
- toea = 100 toea equal 1 kina in Papua New Guinea
- Togo franc = the basic unit of money in Togo
- ton = a British unit of weight equivalent to 2240 pounds / a United States unit of weight equivalent to 2000 pounds
- Tongan monetary unit = monetary unit in Tonga
- tonne = a unit of weight equivalent to 1000 kilograms
- tons = a large number or amount
- top-up = an amount needed to restore something to its former level
- torr = a unit of pressure equal to 0.001316 atmosphere
- torrent = an overwhelming number or amount
- tot = a small amount
- touch = a slight but appreciable amount
- toxicity = the degree to which something is poisonous
- trace = a just detectable amount
- trainload = quantity that can be carried by a train
- transcendental number = an irrational number that is not algebraic
- transmission = the fraction of radiant energy that passes through a substance
- transmittance = the fraction of radiant energy that passes through a substance
- trey = the cardinal number that is the sum of one and one and one
- triad = the cardinal number that is the sum of one and one and one
- trillion = the number that is represented as a one followed by 12 zeros / the number that is represented as a one followed by 18 zeros / a very large indefinite number
- trillion floating point operations per second = a unit for measuring the speed of a computer system
- trillionth = one part in a trillion equal parts
- trine = the cardinal number that is the sum of one and one and one
- Trinidad and Tobago dollar = the basic unit of money in Trinidad and Tobago
- trinity = the cardinal number that is the sum of one and one and one
- trio = the cardinal number that is the sum of one and one and one
- triplet = the cardinal number that is the sum of one and one and one
- troika = the cardinal number that is the sum of one and one and one
- troy = a system of weights used for precious metals and gemstones
- troy ounce = a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound
- troy pound = an apothecary weight equal to 12 ounces or 373.242 grams
- troy unit = any of the unit of the troy system of weights
- troy weight = a system of weights used for precious metals and gemstones
- tub = the amount that a tub will hold
- tubful = the amount that a tub will hold
- tughrik = the basic unit of money in Mongolia
- tugrik = the basic unit of money in Mongolia
- Tunisian dinar = the basic unit of money in Tunisia
- Tunisian dirham = 100 dirhams equal 1 dinar in Tunisia
- Tunisian monetary unit = monetary unit in Tunisia
- Turkish lira = the basic unit of money in Turkey
- Turkish monetary unit = monetary unit in Turkey
- Turkmen monetary unit = monetary unit in Turkmenistan
- Tuvalu dollar = the basic unit of money in Tuvalu
- twain = two items of the same kind
- twelfth = one part in twelve equal parts
- twelfth part = one part in twelve equal parts
- twelve = the cardinal number that is the sum of eleven and one
- twenty = the cardinal number that is the sum of nineteen and one
- twenty percent = one part in five equal parts
- twenty-eight = the cardinal number that is the sum of twenty-seven and one
- twenty-five = the cardinal number that is the sum of twenty-four and one
- twenty-five percent = one of four equal parts
- twenty-four = the cardinal number that is the sum of twenty-three and one
- twenty-nine = the cardinal number that is the sum of twenty-eight and one
- twenty-one = the cardinal number that is the sum of twenty and one
- twenty-seven = the cardinal number that is the sum of twenty-six and one
- twenty-six = the cardinal number that is the sum of twenty-five and one
- twenty-three = the cardinal number that is the sum of twenty-two and one
- twenty-two = the cardinal number that is the sum of twenty-one and one
- two = the cardinal number that is the sum of one and one or a numeral representing this number
- two dozen = the cardinal number that is the sum of twenty-three and one
- two-thirds = two of three equal parts of a divisible whole
- twosome = two items of the same kind
- tyiyn = 100 tyiyn equal 1 som in Kyrgyzstan
- Ugandan monetary unit = monetary unit in Uganda
- Ugandan shilling = the basic unit of money in Uganda
- Ukranian monetary unit = monetary unit in Ukraine
- ullage = the amount that a container (as a wine bottle or tank) lacks of being full
- unformatted capacity = the total number of bytes on a disk including the space that will be required to format it
- unit = any division of quantity accepted as a standard of measurement or exchange
- unit of measurement = any division of quantity accepted as a standard of measurement or exchange
- unit of viscosity = a unit of measurement for viscosity
- United Arab Emirate dirham = the basic unit of money in the United Arab Emirates
- United Arab Emirate monetary unit = monetary unit in the United Arab Emirates
- United States Customary System = the system of weights and measures based on the foot and pound and second and pint that dates back to colonial America but differs in some respects from the British Imperial System
- United States dollar = the basic unit of money in the United States
- United States dry unit = a unit of measurement of capacity for dry substances officially adopted in the United States Customary System
- United States liquid unit = a liquid unit officially adopted in the United States Customary System
- unity = the smallest whole number or a numeral representing this number
- universal gas constant = the universal constant in the gas equation: pressure times volume = R times temperature
- universal gravitational constant = the universal constant relating force to mass and distance in Newton's law of gravitation
- upper limit = the largest possible quantity
- Uruguayan monetary unit = monetary unit in Uruguay
- Uruguayan peso = the basic unit of money in Uruguay
- utility = a measure that is to be maximized in any situation involving choice
- Uzbekistani monetary unit = monetary unit in Uzbekistan
- V = a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt
- var = a unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere
- vara = a Spanish unit of length (about a yard) having different values in different localities
- Venezuelan monetary unit = monetary unit of Venezuela
- verst = a Russian unit of length
- VI = the cardinal number that is the sum of five and one
- Vietnamese monetary unit = monetary unit in Vietnam
- VII = the cardinal number that is the sum of six and one
- VIII = the cardinal number that is the sum of seven and one
- vital capacity = the maximum amount of air that can be exhaled after a maximum inhalation
- volt = a unit of potential equal to the potential difference between two points on a conductor carrying a current of 1 ampere when the power dissipated between the two points is 1 watt
- volt-ampere = a unit of electrical power in an AC circuit equal to the power dissipated when 1 volt produces a current of 1 ampere
- volume = the amount of 3-dimensional space occupied by an object / a relative amount
- volume unit = a unit of measurement of volume or capacity
- W = a unit of power equal to 1 joule per second
- wad = a large number or amount or extent
- wads = a large number or amount
- watt = a unit of power equal to 1 joule per second
- watt second = a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second
- watt-hour = a unit of energy equal to the power of one watt operating for one hour
- wave number = the reciprocal of the wavelength of a wave
- way = space for movement
- Wb = a unit of magnetic flux equal to 100,000,000 maxwells
- weber = a unit of magnetic flux equal to 100,000,000 maxwells
- weight = a coefficient assigned to elements of a frequency distribution in order to represent their relative importance / a unit used to measure weight / a system of units used to express the weight of something
- weight unit = a unit used to measure weight / a decimal unit of weight based on the gram
- weighting = a coefficient assigned to elements of a frequency distribution in order to represent their relative importance
- welterweight = a weight of 28 pounds
- Western Samoan monetary unit = monetary unit in Western Samoa
- whisker = a very small distance or space
- whit = a tiny or scarcely detectable amount
- whole number = any of the natural numbers (positive or negative) or zero
- won = the basic unit of money in North Korea / the basic unit of money in South Korea
- word = a string of bits stored in computer memory
- work unit = a unit of measurement for work
- worth = an indefinite quantity of something having a specified value
- X = the cardinal number that is the sum of nine and one
- XC = the cardinal number that is the product of ten and nine
- XI = the cardinal number that is the sum of ten and one
- XII = the cardinal number that is the sum of eleven and one
- XIII = the cardinal number that is the sum of twelve and one
- XIV = the cardinal number that is the sum of thirteen and one
- XIX = the cardinal number that is the sum of eighteen and one
- XL = the cardinal number that is the product of ten and four
- XV = the cardinal number that is the sum of fourteen and one
- XVI = the cardinal number that is the sum of fifteen and one
- XVII = the cardinal number that is the sum of sixteen and one
- XVIII = the cardinal number that is the sum of seventeen and one
- XX = the cardinal number that is the sum of nineteen and one
- XXI = the cardinal number that is the sum of twenty and one
- XXII = the cardinal number that is the sum of twenty-one and one
- XXIII = the cardinal number that is the sum of twenty-two and one
- XXIV = the cardinal number that is the sum of twenty-three and one
- XXIX = the cardinal number that is the sum of twenty-eight and one
- XXV = the cardinal number that is the sum of twenty-four and one
- XXVI = the cardinal number that is the sum of twenty-five and one
- XXVII = the cardinal number that is the sum of twenty-six and one
- XXVIII = the cardinal number that is the sum of twenty-seven and one
- XXX = the cardinal number that is the product of ten and three
- yard = a unit of volume (as for sand or gravel) / a unit of length equal to 3 feet; defined as 91.44 centimeters
- yarder = the height or length of something in yards
- YB = a unit of information equal to 1024 zebibytes or 2^80 bytes / a unit of information equal to 1000 zettabytes or 10^24 bytes / a unit of information equal to 1000 zettabits or 10^24 bits
- Ybit = a unit of information equal to 1000 zettabits or 10^24 bits
- Yemeni fils = 100 Yemeni fils are worth one Yemeni rial
- Yemeni monetary unit = monetary unit in Yemen
- Yemeni rial = the basic unit of money in Yemen
- yen = the basic unit of money in Japan
- YiB = a unit of information equal to 1024 zebibytes or 2^80 bytes
- Yibit = a unit of information equal to 1024 zebibits or 2^80 bits
- yield = the quantity of something (as a commodity) that is created
- yobibit = a unit of information equal to 1024 zebibits or 2^80 bits
- yobibyte = a unit of information equal to 1024 zebibytes or 2^80 bytes
- yoke = two items of the same kind
- yottabit = a unit of information equal to 1000 zettabits or 10^24 bits
- yottabyte = a unit of information equal to 1024 zebibytes or 2^80 bytes / a unit of information equal to 1000 zettabytes or 10^24 bytes
- Young's modulus = a coefficient of elasticity applicable to the stretching of a wire
- yuan = the basic unit of money in China
- Yugoslavian dinar = the basic unit of money in Yugoslavia
- Yugoslavian monetary unit = monetary unit in Yugoslavia
- zaire = the basic unit of money in Zaire
- Zairese monetary unit = monetary unit in Zaire
- Zambian kwacha = the basic unit of money in Zambia
- Zambian monetary unit = monetary unit in Zambia
- ZB = a unit of information equal to 1024 exbibytes or 2^70 bytes / a unit of information equal to 1000 exabytes or 10^21 bytes / a unit of information equal to 1000 exabits or 10^21 bits
- Zbit = a unit of information equal to 1000 exabits or 10^21 bits
- zebibit = a unit of information equal to 1024 exbibits or 2^70 bits
- zebibyte = a unit of information equal to 1024 exbibytes or 2^70 bytes
- zero = a quantity of no importance / a mathematical element that when added to another number yields the same number
- zettabit = a unit of information equal to 1000 exabits or 10^21 bits
- zettabyte = a unit of information equal to 1024 exbibytes or 2^70 bytes / a unit of information equal to 1000 exabytes or 10^21 bytes
- ZiB = a unit of information equal to 1024 exbibytes or 2^70 bytes
- Zibit = a unit of information equal to 1024 exbibits or 2^70 bits
- zilch = a quantity of no importance
- zillion = a very large indefinite number
- Zimbabwean dollar = the basic unit of money in Zimbabwe
- zip = a quantity of no importance
- zippo = a quantity of no importance
- zloty = the basic unit of money in Poland