/ Dictionary / Index M monochromator: Meaning and Definition of Find definitions for: mon•o•chro•ma•tor Pronunciation: (mon"u-krō'mā-tur), [key] — n. Optics. 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. monochromatism monochrome Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language