Breadcrumb Home > Dictionary > Index T trilocular: Meaning and Definition of Find definitions for: tri•loc•u•lar Pronunciation: (trī-lok'yu-lur), [key] — adj. Bot., Zool. having three loculi, chambers, or cells. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trilobite trilogy ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language