/ Dictionary / Index T trigonous: Meaning and Definition of Find definitions for: trig•o•nous Pronunciation: (trig'u-nus), [key] — adj. having three angles or corners, as a stem or seed; triangular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. trigonometry trigonum Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language