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Meaning of monochromator

mon•o•chro•ma•tor

Pronunciation: (mon"u-krō'mā-tur), [key]
— n. Optics.
  1. a spectroscope with a slit that can be moved across the spectrum for viewing individual spectral bands. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.