/ Dictionary / Index V vasoconstriction: Meaning and Definition of Find definitions for: vas•o•con•stric•tion Pronunciation: (vas"ō-kun-strik'shun, vā"zō-), [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: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language