"monochrome" in the noun sense
painting done in a range of tones of a single color
2. black and white, monochrome
a black-and-white photograph or slide
"monochrome" in the adjective sense
1. monochromatic, monochrome, monochromic, monochromous
having or appearing to have only one color
Source: WordNet® (An amazing lexical database of English)
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