/ Dictionary / Index T trilobed: Meaning and Definition of Find definitions for: tri•lobed Pronunciation: (trī'lōbd"), [key] — adj. trilobate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: trilobed (Thesaurus) trilobate trilobite Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language