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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

n.

c.1400, from Old French dilatation, from Late Latin dilatationem (nominative dilatatio) "a widening," from past participle stem of Latin dilatare (see dilate).

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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