/ Dictionary / Index D dihedral angle: Meaning and Definition of Find definitions for: dihe'dral an'gle Pronunciation: [key] — Geom. Geom. the angle between two planes in a dihedron. dihedron. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dihedral dihedron Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language