Noun: dichromasy
- A deficiency of colour vision in which the person can match any given hue by mixing only two other wavelengths of light
"dichromasy is a form of colour blindness";
- dichromacy, dichromatism, dichromatopsia, dichromia
Type of: color blindness [US], color vision deficiency [US], colour blindness [Brit, Cdn], colour vision deficiency [Brit, Cdn]