/ Dictionary / Index T tribo-: Meaning and Definition of Find definitions for: tribo- Pronunciation: [key] a combining form meaning “friction,” used in the formation of compound words: triboelectricity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tribespeople triboelectricity Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language