Breadcrumb Home > Dictionary Cite Meaning of vasomotion Find definitions for: vas•o•mo•tion Pronunciation: (vas"ō-mō'shun, vā"zō-), [key] — n. Physiol. the change in diameter of a blood vessel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vasoligature vasomotor Related Content Daily Word Quiz: philistine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language