For all your dictionary needs!
Spelling. Are you looking for Enzym or Enzymes?
Header of enzyme


Video footage: Enzyme in action (Pyruvate Dehydrogenase)
Play/pauseBuy footageFind more

Definition of the noun enzyme

What does enzyme mean as a name of something?

noun - plural: enzymes

  1. any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions
    • examples: Pineapples contain an enzyme denominated bromelain that decomposes some proteins. | This enzyme is produced in the stomach.
    • lexical domain: Substances - nouns denoting substances
    • more generic words: accelerator / catalyst = a substance that initiates or accelerates a chemical reaction without itself being affected; protein = any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues
    • more specific terms:
      • adenosine deaminase / ADA = an enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia
      • amylase = any of a group of proteins found in saliva and pancreatic juice and parts of plants
      • cholinesterase = an enzyme that hydrolyses acetylcholine
      • coagulase = an enzyme that induces coagulation
      • collagenase = any enzyme that catalyzes the hydrolysis of collagen and gelatin
      • complement = one of a series of enzymes in the blood serum that are part of the immune response
      • catalase = enzyme found in most plant and animal cells that functions as an oxidative catalyst
      • cyclooxygenase / Cox = either of two related enzymes that control the production of prostaglandins and are blocked by aspirin
      • decarboxylase = any of the enzymes that hydrolize the carboxyl group
      • de-iodinase = an enzyme that removes the iodine radical
      • disaccharidase = an enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides
      • elastase = a pancreatic enzyme that catalyzes the hydrolysis of elastin
      • enterokinase = enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin
      • histaminase = enzyme that acts as a catalyst in converting histidine to histamine
      • isomerase = an enzyme that catalyzes its substrate to an isomeric form
      • kinase = an enzyme that catalyzes the conversion of a proenzyme to an active enzyme
      • lipase = an enzyme secreted in the digestive tract that catalyzes the breakdown of fats into individual fatty acids that can be absorbed into the bloodstream
      • muramidase / lysozyme = an enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria
      • monoamine oxidase / MAO = an enzyme that catalyzes the oxidation of many body compounds
      • nitrogenase = an enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia
      • nuclease = general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units
      • oxidase = any of the enzymes that catalyze biological oxidation
      • oxidoreductase = an enzyme that catalyzes oxidation-reduction
      • papain = a proteolytic enzyme obtained from the unripe papaya
      • beta-lactamase / penicillinase = enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic
      • pepsin = an enzyme produced in the stomach that splits proteins into peptones
      • pepsinogen = precursor of pepsin
      • phosphatase = any of a group of enzymes that act as a catalyst in the hydrolysis of organic phosphates
      • fibrinolysin / plasmin = an enzyme that dissolves the fibrin of blood clots
      • polymerase = an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA
      • proteolytic enzyme / proteinase / peptidase / protease = any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis
      • reductase = an enzyme that catalyses the biochemical reduction of some specified substance
      • chymosin / rennin = an enzyme that occurs in gastric juice
      • secretase = a set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue
      • streptodornase = an enzyme produced by some hemolytic strains of streptococcus that dissolves fibrinous secretions from infections
      • streptokinase = an enzyme produced by some strains of streptococcus that can liquefy blood clots by converting plasminogen to plasmin
      • superoxide dismutase / SOD = an enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen
      • telomerase = an enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide
      • transferase = any of various enzymes that move a chemical group from one compound to another compound
      • trypsin = an enzyme of pancreatic origin
      • urease = an enzyme that catalyzes the hydrolysis of urea into carbon dioxide and ammonia
      • zymase = a complex of enzymes that cause glycolysis
    • part: active site = the part of an enzyme or antibody where the chemical reaction occurs


  1. Enzyme: Enzymes are macromolecular biological catalysts. They are responsible for thousands of metabolic processes that sustain life. Enzymes are highly selective catalysts, greatly accelerating both the rate and specificity of metabolic chemical reactions, from the digestion of food to the synthesis of DNA. Most enzymes are proteins, although some catalytic RNA molecules have been identified. Enzymes adopt a specific three-dimensional structure, and may employ organic and inorganic cofactors to assist in catalysis.
    • also known as ferment, kvasina
  2. Enzyme: Enzymes (pron.

Phrases with enzyme

Phrases starting with the word enzyme:

  1. Enzyme Inhibitor
  2. enzyme-linked-immunosorbent serologic assay

Phrases ending with the word enzyme:

  1. Adaptive Enzyme
  2. proteolytic enzyme
  3. restriction enzyme
  4. angiotensin converting enzyme
  5. angiotensin-converting enzyme

Other phrase containing the word enzyme:

  1. angiotensin-converting enzyme inhibitor

Printed dictionaries and other books with definitions for enzyme

Click on a title to look inside that book (if available):

Google previewHandbook of Biotransformations of Aromatic Compounds (2004)

by B.L. Goodwin

Transamination D-Phenylglycine aminotransferase Pseudomonas stutzeri enzyme is a homodimer, molecular weight 92000,

Google previewDNA Replication (2005)

by Arthur Kornberg, Tania A. Baker

coli enzyme is a 75-kDa polypeptide with a sedimentation coefficient of Ligases and Polynucleotide 3.9S, suggestive of an elongated shape. The enzyme is susceptible to adventi- Kmases tious proteolysis as ...

Google previewOxidases and Related Redox Systems (2013)

Proceedings of the Third International Symposium on Oxidases and Related Redox Systems, held in the State University of New York at Albany, USA by Tsso E. King, Howard S. Mason, Martin Morrison

VLIEGENTHART: We think the reduced enzyme is a complex of Fe and...

Google previewMetabolism of Drugs and Other Xenobiotics (2012)

by Pavel Anzenbacher, Ulrich M. Zanger

The second enzyme is the NAD(P)H oxidoreductase, also named DT-diaphorase since it can use both NADH (abbreviated DPNH in earlier...

The soluble cytosolic enzyme is a dimer oftwo identical subunits, each containing the FAD moiety, ...

Google previewConcise Encyclopedia Biochemistry and Molecular Biology (1997)

by Thomas Scott, Eric Ian Mercer

Enzyme immunodetection assay rows showing the direction of the reaction. Each arrow is labeled with the corresponding rate constant. An E.g. simplifies the writing of Rate equations (see) for the reactions. The Fig. shows an example of an ...

Google previewTaber's Cyclopedic Medical Dictionary (2013)

by Donald Venes, MD

enzyme eosinophil chemotactic factor branching e. An enzyme, called a glycosyltransferase, that transfers a carbohydrate unit from one molecule to another. brush border e. An enzyme produced by the cells of the villi and microvilli (brush ...

Google previewElectrochemical Dictionary (2012)

by Allen J. Bard, György Inzelt, Fritz Scholz

E Electrochemical transducer and indicated species or effects Voltammetric and Potentiometric coulometric electrodes; electrodes/ISFETs Analytes Enzyme classes (Current, Charge) (Potential) (Capacitance) Enzymesubstrates Activators ...

Google previewSarup's Dictionary of Biotechnology (2000)

by Rita Singh

Techniques fall into two groups; those used to separate enzymes from solid substrate culture; those used to release enzymes from the interior of microbial cells. — Enzyme fermentation. A process in which a microorganism is grown as ...

Google previewDictionary of Flavors (2008)

by Dolf De Rovira

Chart 175 Enzyme Modified Milk Enzymatic Conversion — The change of one molecule to another by the use of enzymes. Enzyme conversion has an advantage over typical chemical reactions because it can ...

Google previewIllustrated Dictionary of Immunology, Third Edition (2009)

by Julius M. Cruse, Robert E. Lewis

enzyme immunoassay (EIA) membranes of infected cells and on the host-cell- derived membrane coats of viral particles. The NV proteins may be required for viral infectivity. HIV env proteins include gp41 and gp120, which bind to CD4 and ...

Google previewEncyclopaedic Dictionary of Biology (2003)

by S. Choudhary

environmental quality standard 196 enzyme replacement therapy 197. Unlike an environmental quality standard, an EQO is not usually expressed in quantitative terms and cannot be enforced legally. environmental quality ...

Google previewA Dictionary of Chemical Engineering (2014)

by Carl Schaschke

equilibrium enzyme A protein molecule that catalyzes biochemical reactions. It has a complex molecular structure and its molecular shape or conformation plays an important role in its function as a catalyst. Enzymes as biocatalysts ...

Online dictionaries and encyclopedias with entries for enzyme

Click on a label to prioritize search results according to that topic:

Photos about enzyme

Click on an item to view that photo:


Rennet Enzyme

Photo credit: tjmwatson

If you need related images for an article or a report, you can download stock photos:
Small photo of pineapple yellow flesh is very good fruit because there is enzyme.Small photo of Portrait of a scientist taking aliquote of an enzyme in modern labSmall photo of Serious female scientist takes aliquote from enzyme tubeSmall photo of IRVINE, CA - JUNE 9, 2014: Closeup of a bottle of Pepsi soda in ice. Originally named "Brad's Drink" it was later changed to Pepsi Cola after the digestive enzyme pepsin and kola nuts in the recipe.Small photo of Set of Isolated starch agar plate: Bacteria name "Actinomycetes" were test with medium call starch agar to check the ability for hydrolysis starch in medium. The clear zone indicated enzyme productionSmall photo of Serious female scientist takes aliquote from enzyme tubeSmall photo of Serious female scientist takes aliquote from enzyme tube More...

Video language resources about enzyme

Click on an item to play that video:

View more videos about Restriction Enzyme and Angiotensin Converting Enzyme.

See also the pronunciation examples of enzyme!

Quotes about enzyme

A key issue in developmental biology at that time was the problem of how cells underwent differentiation, with most workers concentrating on explanations in terms of changes in enzyme and gene regulation. (Paul Nurse)
more quotes about enzyme...

Scrabble value of E1N1Z10Y4M3E1

The value of this 6-letter word is 20 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

Share this page


Go to the usage examples of enzyme to see it in context!

Privacy Policy
Keyword Tool | Romanian-English Dictionary