/ Dictionary / Index T triradiate: Meaning and Definition of Find definitions for: tri•ra•di•ate Pronunciation: (trī-rā'dē-it, -āt"), [key] — adj. having three rays or raylike processes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triquetrous triradius 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