/ Dictionary / Index T trifoliate orange: Meaning and Definition of Find definitions for: trifo'liate or'ange Pronunciation: [key] a spiny, Chinese orange tree, Poncirus trifoliata, used as a stock in grafting and for hedges. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trifoliate trifoliolate Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language