/ Dictionary / Index V vasoconstriction: Meaning and Definition of Find definitions for: vas•o•con•stric•tion Pronunciation: (vas"?-kun-strik'shun, v?"z?-), [key] ? n. Physiol. constriction of the blood vessels, as by the action of a nerve. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: vasoconstriction (Thesaurus) vasoactive vasoconstrictive 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