monochromat

monochromate (ˌmɒnəʊˈkrəʊmeɪt)

/ (ˌmɒnəʊˈkrəʊmæt) /

noun

a person who perceives all colours as a single hue

Medical definitions for monochromat

monochromat
[ mŏn′ə-krōmăt ]

n.

A person with achromatopsia.