/ Dictionary / Index P prism binocular: Meaning and Definition of Find definitions for: prism' binoc"ular Pronunciation: [key] Usually,binocular (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prismatoid prism diopter Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language