What does "dichromacy" mean?

The quality of having two independent channels for conveying color information in the eye.

Dichromacy

Common synonyms include: animal dichromacy, color blindness, color vision deficiency, dichromasy, dichromatism, dichromatopsia.

noun

noun ·Rare ·Advanced level

Noun

1
The quality of having two independent channels for conveying color information in the eye. uncountable
2
a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision) wordnet

di- + Ancient Greek χρῶμα (khrôma, “color”).