Meaning of Amici prism

A•mi'ci prism"

Pronunciation: (u-mē'chē), [key]
— Optics. Optics.
  1. a compound prism that spreads out incident white light into a spectrum but produces no deviation of the central color of the dispersed beam. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.