Nicol prism: Meaning and Definition of

Nic'ol prism"

Pronunciation: (nik'ul), [key]
— Optics. Optics.
  1. one of a pair of prisms used to produce and analyze plane-polarized light in a polarizing microscope. Also calledCf.(def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.