"of one color, consisting of light of one wavelength," 1807, from mono- + chromatic, or from monochrome. Perhaps based on French monochromatique or Greek monokhrōmatos "of one color." Related: Monochromatically (1784).
monochromatic light
monkshood
Monmouth
mono-
mono
monoceros
monochromatic
monochrome
monocle
monocular
monoculture
monogamous
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