Amici prism

noun 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.

Origin of Amici prism

named after G. B. Amici (1784–1863), Italian astronomer
Also called direct-vision prism, roof prism. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018