/ Dictionary / Index O obtuse triangle: Meaning and Definition of Find definitions for: obtuse' tri'angle Pronunciation: [key] — Geom. Geom. a triangle with one obtuse angle. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. obtuse bisectrix Obuda Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language