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