/ Dictionary / Index V vasoconstrictor: Meaning and Definition of Find definitions for: vas•o•con•stric•tor Pronunciation: (vas"ō-kun-strik'tur, vā"zō-), [key] — n. Physiol., Pharm. a nerve or drug that causes vasoconstriction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: vasoconstrictor (Thesaurus) vasoconstrictive vasodepressor Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language