/ Dictionary / Index T trisepalous: Meaning and Definition of Find definitions for: tri•sep•al•ous Pronunciation: (trī-sep'u-lus), [key] — adj. Bot. having three sepals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trisect triseptate Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language