/ Dictionary / Index O obtuse bisectrix: Meaning and Definition of Find definitions for: obtuse' bisec'trix Pronunciation: [key] — Crystall. Crystall. See under(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. obtuse angle obtuse triangle Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language