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dilatation

[dil-uh-tey-shuh n, dahy-luh-] /ˌdɪl əˈteɪ ʃən, ˌdaɪ lə-/
noun
1.
a dilated formation or part.
2.
Pathology. an abnormal enlargement of an aperture or a canal of the body.
3.
Surgery.
  1. an enlargement made in a body aperture or canal for surgical or medical treatment.
  2. a restoration to normal patency of an abnormally small body opening or passageway, as of the anus or esophagus.
4.
Mechanics. the increase in volume per unit volume of a homogeneous substance.
Also, dilation.
Origin
1350-1400
1350-1400; Middle English (< Old French) < Latin dīlātātiōn- (stem of dīlātātiō), equivalent to dīlātāt(us) spread out (past participle of dīlātāre to dilate) + iōn- -ion
Related forms
dilatational, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for dilatational
dilatation
c.1400; see dilation.
Online Etymology Dictionary, © 2010 Douglas Harper
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dilatational in Medicine

dilatation dil·a·ta·tion (dĭl'ə-tā'shən, dī'lə-)
n.
Physiological, pathological, or artificial enlargement of a cavity, canal, blood vessel, or opening.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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