/ Dictionary / Index F Fresnel biprism: Meaning and Definition of Find definitions for: Fresnel' bi'prism Pronunciation: [key] — Optics. Optics. biprism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fresnel Fresnel lens Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language