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[vas-oh-dil-uh-tey-shuh n, -dahy-luh-, vey-zoh-] /ˌvæs oʊˌdɪl əˈteɪ ʃən, -ˌdaɪ lə-, ˌveɪ zoʊ-/
noun, Physiology.
dilatation of the blood vessels, as by the action of a nerve.
Also, vasodilation
[vas-oh-dahy-ley-shuh n, -di-, vey-zoh-] /ˌvæs oʊ daɪˈleɪ ʃən, -dɪ-, ˌveɪ zoʊ-/ (Show IPA)
Origin of vasodilatation
First recorded in 1895-1900; vaso- + dilatation Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Word Origin and History for vasodilation

1896, from vasopressor, from vaso-, comb. form of Latin vas "container, vessel" (see vas) + dilation. Related: Vasodilator (1881).

Online Etymology Dictionary, © 2010 Douglas Harper
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vasodilation in Medicine

vasodilation va·so·di·la·tion (vā'zō-dī-lā'shən, -dĭ-) or va·so·dil·a·ta·tion (-dĭl'ə-tā'shən, -dī'lə-)
Dilation of a blood vessel, as by the action of a nerve or drug. Also called phlebarteriectasia.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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vasodilation in Science
vasodilation (vā'zō-dī-lā'shən, -dĭ-) also vasodilatation
  (vā'zō-dī-lā'shən, -dĭ-)   
Dilation of a blood vessel, as by the action of a nerve or drug.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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