monochrome (n.)

1660s, "painting or drawing done in different tints of a single color," from Greek monochromos "of a single color," from monos "single, alone" (from PIE root *men- (4) "small, isolated") + khroma (genitive khromatos) "color, complexion, skin" (see chroma). As an adjective from 1849. Photographic sense is recorded from 1940.

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