For all your dictionary needs!
Spelling. Are you looking for Silation?
Header of dilation


Video footage: Large males eye looking into camera closeup. Shot in slow motion to see the eyes natural wobble and pupil dilation when focusing
Play/pauseBuy footageFind more

Definition of the noun dilation

What does dilation mean as a name of something?

noun - plural: dilations

  1. a lengthy discussion (spoken or written) on a particular topic
  2. the act of expanding an aperture
    • example: the dilation of the pupil of the eye
    • lexical domain: Acts - nouns denoting acts or actions
    • synonym of dilation: dilatation
    • more generic words: enlargement / expansion = the act of increasing (something) in size or volume or quantity or scope
    • more specific words:
      • vasodilation = dilation of blood vessels
      • mydriasis = reflex pupillary dilation as a muscle pulls the iris outward

Alternative definition of the noun dilation


  1. See Delay.
  2. The act of dilating, or the state of being dilated; expansion; dilatation.


  1. "Dilation" is the debut album by comedian Rory Scovel released digitally on October 4, 2011 by Stand Up! Records.
    • genre: Comedy
    • released in (4 years ago)
  2. "Dilation" is a musical album of Grandbrothers.


  1. Dilation is one of the basic operations in mathematical morphology. Originally developed for binary images, it has been expanded first to grayscale images, and then to complete lattices. The dilation operation usually uses a structuring element for probing and expanding the shapes contained in the input image.
  2. Dilation: In mathematics, a dilation is a function from a metric space into itself that satisfies the identity for all points where is the distance from to and is some positive real number. In Euclidean space, such a dilation is a similarity of the space. Dilations change the size but not the shape of an object or figure. Every dilation of a Euclidean space that is not a congruence has a unique fixed point that is called the center of dilation. Some congruences have fixed points and others do not.
  3. Dilation: In operator theory, a dilation of an operator T on a Hilbert space H is an operator on a larger Hilbert space K, whose restriction to H composed with the orthogonal projection onto H is T.

Phrases with Dilation

  1. dilation and curettage
  2. Time dilation

Printed dictionaries and other books with definitions for Dilation

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

Google previewMathematical Practices, Mathematics for Teachers: Activities, Models, and Real-Life Examples (2014)

by Ron Larson, Robyn Silbey

Because the blue triangle is smaller, the dilation is a reduction. The dimensions of the blue triangle are about one-half...

Because the blue square is larger, the dilation is an enlargement. The dimensions of the blue square are about twice the ...

Google previewToxicologic Pathology (2013)

Nonclinical Safety Assessment by Pritam S. Sahota, James A. Popp, Jerry F. Hardisty, Chirukandath Gopinath

Congenital renal pelvic dilation refers to the often inconsequential form that may be noted in both juvenile and older rats, mice, and hamsters. Iatrogenic pelvic dilation is the term sometimes ascribed to the more severe drug-induced form, ...

Google previewSoft Computing (2005)

Dilation is an operation that "grows" objects in an image.

Google previewCliffsNotes Praxis II: Mathematics Content Knowledge Test (0061), Second Edition (2012)

by Sandra Luna McCune, Ennis Donice McCune

Informally, a dilation is an expanding (|k| > 1) or contracting (|k| < 1) of a geometric shape using a scale factor, while its...

Google previewCrohn's Disease (2011)

The Complete Guide to Medical Management by Gary R. Lichtenstein

balloon dilation is a well- established technique in the upper gastrointestinal tract, but in the past 15 years this procedure has also come to age in the management of CD-related ileocolonic strictures.61 TTS balloons ...

Google previewEvidence-based Gastroenterology (2001)

by E. Jan Irvine, Richard H. Hunt

Bougie dilation is ineffective, but pneumatic dilation is a very effective treatment for achalasia (level 1A). The most commonly used dilator is the Rigiflex balloon. Similar to an angioplasty catheter, these polyethylene balloons (inflated outer ...

Google previewKnottenbelt and Pascoe's Color Atlas of Diseases and Disorders of the Horse E-Book (2014)

by Siobhan Brid McAuliffe

Clinical signs and diagnosis • Esophageal dilation is a functional obstruction and as ...

Google previewEosinophilic Esophagitis (2011)

by Chris A. Liacouras, Jonathan E. Markowitz

Esophageal dilation is a useful adjunctive therapy that has been used in combination with medical therapy [2]. Safety concerns that support a conservative dilation strategy were discussed in the preceding section. Patients with resolution of ...

Google previewCurrent High-energy Emission Around Black Holes (2002)

Proceedings of the 2nd KIAS Astrophysics Workshop : Korea Institute for Advanced Study, September 3-8, 2001 by H?n-y?ng Chang

Introduction Time dilation is a fundamental property of an expanding universe. Cosmo- logical objects should not only be redshifted in energy but also extended in time because of ...

Google previewSurgical Management of Obesity (2007)

by Henry Buchwald, George S. M. Cowan, Walter J. Pories

Treatment Balloon dilation is the treatment of choice for stricture following RYGB or laparoscopic RYGB. It may be done either endoscopically or fluoroscopically. The advantages of the endoscopic approach are that the diagnosis can be ...

Google previewDoing Physics with Scientific Notebook (2012)

A Problem Solving Approach by Joseph Gallant

Time dilation is a property of time. Clocks simply measure time intervals. Moving clocks run slower because the time they're measuring elapses slower. All clocks at rest relative to the events, including biological clocks, measure the same ...

Google previewThe New Dad Dictionary (2015)

Everything He Really Needs to Know - from A to Z by Chris Illuminati

Dilation is the opening of the cervix, and effacement is the thinning of the cervix. The dilation is measured in centimeters, while effacement is measured in percentage. The two processes mean a pregnant woman is getting closer to giving birth ...

Google previewThe Universal Modern Cambist, and Foreign and Domestic Commercial Calculator; Or, A Dictionary of Numerical, Arithmetical, and Mathematical Facts, Tables, Data, Formulas ... (1875)


Google previewMosby's Dictionary of Medicine, Nursing and Health Professions - Australian & New Zealand Edition (2009)

by Peter Harris, Sue Nagy, Nicholas Vardaxis

See also fractional dilation and curettage. dilate /di'lat/, to cause a physiological increase in the diameter of a body opening, blood vessel or tube, such as the widening of the pupil of the eye in response to decreased light or the widening of the ...

Google previewThe American Encyclopedia and Dictionary of Ophthalmology (1921)

by Casey Albert Wood

As the case progresses, and the patient recovers vision, the extreme dilation of the pupil passes away, and the normal movements are reestablished. But it is probable that some enlargement remains permanently in quite a number of the ...

Google previewEncyclopedia of Algorithms (2008)

by Ming-Yang Kao

The dilation of G is defined by (G) := max (p; q) : (2) p=q2V This value is also known as the spanning ratio or the...

whose dilation (G) is as ...

Google previewCRC Concise Encyclopedia of Mathematics, Second Edition (2002)

by Eric W. Weisstein

Dilation A SIMILARITY TRANSFORMATION which transforms each line to a PARALLEL line whose length is a fixed multiple of the length of the original line. The simplest dilation is therefore a TRANSLATION, and any dilation that is not merely ...

Google previewDictionary of Analysis, Calculus, and Differential Equations (1999)

by Douglas N. Clark

dilation For a linear operator T : H - > H ...

Google previewAn Einstein Encyclopedia (2015)

by Alice Calaprice, Daniel Kennefick, Robert Schulmann

Dilation. The clear understanding of the role time played in a relativistic theory of physics that Einstein achieved in mid-1905 permitted him to realize that observers would not only measure the length of a moving object to be different from that ...

Google previewBlack's Veterinary Dictionary (2015)

Dilation. in. Rabbits. This is often associated with intestinal obstruction. rabbits continually salivate; the saliva is swallowed and the obstruction causes the fluid to build up in the stomach. The animal cannot regurgitate because of the cardiac ...

Google previewBlack's Student Veterinary Dictionary (2017)

Dilation. in. Rabbits. This is often associated with intestinal obstruction. Rabbits continually salivate; the saliva is swallowed and the obstruction causes the fluid to build up in the stomach. The animal cannot regurgitate because of the cardiac ...

Google previewThe Encyclopedia of the Solid Earth Sciences (2009)

by Philip Kearey

dilation — ground level and water levels in wells — acoustic emissions from microearthaaakcs as cracks propagate, 5 wave splitting has been proposed as a means of observing dilatancy. Cracks with a common alignment will cause 5 waves ...

Online dictionaries and encyclopedias with entries for Dilation

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

Photos about Dilation

Click on an item to view that photo:


View more pictures about Time dilation.

If you need related images for an article or a report, you can download stock photos:
Small photo of Castle wall made by the technique of introducing into the mortar small pieces of other materials of different degree of dilation, which hinders the formation of cracks in the wall. More...

Video language resources about Dilation

Click on an item to play that video:

View more videos about Time dilation.

See also the pronunciation examples of Dilation!

Scrabble value of D2I1L1A1T1I1O1N1

The value of this 8-letter word is 9 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

Anagrams of DILATION

What do you get if you rearrange the letters?

See also the blanagrams of Dilation!

Share this page


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

Privacy Policy | Cookies Policy
Keyword Tool | Romanian-English Dictionary