Meaning of vasoactive

vas•o•ac•tive

Pronunciation: (vas"ō-ak'tiv, vā"zō-), [key]
— adj. Physiol., Pharm.
  1. of or pertaining to a substance, drug, or event that changes the diameter of a blood vessel.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.