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biprism: Meaning and Definition of

bi•prism

Pronunciation: (bī'priz"um), [key]
— n. Optics.
  1. a triangular prism with an apex angle slightly less than 180°: when illuminated by a point source of light it produces two overlapping beams that form an interference pattern on a screen. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
bippy bipropellant
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