The Collaborative International Dictionary
Acritochromacy
Acritochromacy \Ac`ri*to*chro"ma*cy\, n. [Gr. ? undistinguishable; 'a priv. + ? to separate, distinguish + ? color.] Color blindness; achromatopsy.
Wiktionary
acritochromacy
n. (context archaic medicine English) colorblindness, achromatopsia.