/ Dictionary / Index V vasomotor: Meaning and Definition of Find definitions for: vas•o•mo•tor Pronunciation: (vas"ō-mō'tur, vā"zō-), [key] — adj. Physiol. regulating the diameter of blood vessels, as certain nerves. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: vasomotor (Thesaurus) vasomotion vasopressin 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