/ Dictionary / Index T triquetrous: Meaning and Definition of Find definitions for: tri•que•trous Pronunciation: (trī-kwē'trus, -kwe'-), [key] — adj. three-sided; triangular. having a triangular cross section. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. triquetra triradiate 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