/ Dictionary / Index V vaso-: Meaning and Definition of Find definitions for: vaso- Pronunciation: [key] a combining form meaning “vessel,” used in the formation of compound words: vasoconstrictor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vasiform vasoactive 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