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