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