/ Dictionary / Index T triolein: Meaning and Definition of Find definitions for: tri•o•le•in Pronunciation: (trī-ō'lē-in), [key] — n. Chem. olein (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: triolein (Thesaurus) triol triolet Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language