/ Dictionary / Index T tricuspid valve: Meaning and Definition of Find definitions for: tricus'pid valve' Pronunciation: [key] — Anat. Anat. the valve, consisting of three triangular flaps of tissue between the right auricle and ventricle of the heart, that keeps blood from flowing back into the auricle. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tricuspidate tricyanic acid Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language