- a device that isolates a single wavelength of radiation
WordReference Random House Unabridged Dictionary of American English © 2026
mon•o•chro•ma•tor
(mon′ə krō′mā tər),USA pronunciation n. [Optics.]
- Opticsa spectroscope with a slit that can be moved across the spectrum for viewing individual spectral bands. Also called mon′ochromat′ic illu′minator.
- monochromat(ic) + (illuminat)or 1905–10
Collins Concise English Dictionary © HarperCollins Publishers::
monochromator /ˌmɒnəʊˈkrəʊmeɪtə/ n