monochromator

noun
mono·chro·ma·tor | \ˌmä-nə-ˈkrō-ˌmā-tər \

Definition of monochromator 

: a device for isolating a narrow portion of a spectrum

First Known Use of monochromator

1909, in the meaning defined above

History and Etymology for monochromator

monochromatic + illuminator

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The first known use of monochromator was in 1909

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monochromator

noun
mono·chro·ma·tor | \ˌmän-ə-ˈkrō-ˌmāt-ər \

Medical Definition of monochromator 

: a device for isolating a narrow portion of a spectrum

More from Merriam-Webster on monochromator

Britannica.com: Encyclopedia article about monochromator

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