/ Dictionary / Index T tricuspid: Meaning and Definition of Find definitions for: tri•cus•pid Pronunciation: (trī-kus'pid), [key] — adj. having three cusps or points, as a tooth. Cf. bicuspid. of, pertaining to, or affecting the tricuspid valve. —n. a tricuspid part, as a tooth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tricuspid (Thesaurus) trictrac tricuspidate 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