/ Dictionary / Index T triol: Meaning and Definition of Find definitions for: tri•ol Pronunciation: (trī'ôl, -ol), [key] — n. Chem. a compound having three hydroxyl groups. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trioecious triolein Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language