Definition of monochromaticity in English:

monochromaticity

Pronunciation /ˌmɒnə(ʊ)ˌkrəʊməˈtɪsɪti/

noun

Physics
  • The condition of being monochromatic; the extent to which radiation consists of a single wavelength or frequency.

Origin

Early 20th century. From mono- + chromaticity, after monochromatic.