Definition of achromatopsia in English:

achromatopsia

(also achromatopsy)

noun

Medicine
  • Inability to distinguish between some or (usually) all colours; absence, severe impairment, or loss of colour vision; colour blindness, especially monochromatism.

Origin

Mid 19th century; earliest use found in The Lancet. From German Achromatopsie, † Achromatopsia from ancient Greek ἀχρώματος + Hellenistic Greek -οψία.

Pronunciation:

achromatopsia

/ˌeɪkrəʊməˈtɒpsɪə//əkrəʊməˈtɒpsɪə/