[vas-oh-ak-tiv, vey-zoh-]
adjective Physiology, Pharmacology.
of or pertaining to a substance, drug, or event that changes the diameter of a blood vessel.

1920–25; vaso- + active Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
vasoactive (ˌveɪzəʊˈæktɪv)
affecting the diameter of blood vessels: vasoactive peptides

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

vasoactive va·so·ac·tive (vā'zō-āk'tĭv)
Causing constriction or dilation of blood vessels.

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