/ Dictionary / Index V vasoconstrictor: Meaning and Definition of Find definitions for: vas•o•con•stric•tor Pronunciation: (vas"?-kun-strik'tur, v?"z?-), [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: maritime Analogy of the Day: Today?s Analogy Spelling Bee: Today?s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language