dichromatism

名词 dichromatism:

1. 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)
   同义词：dichromacy, dichromatopsia, dichromia, dichromasy

di.chro.ma.tism

n.（名词）
The quality or condition of being dichromatic.
二色性：呈现二色性的状态或情状
Pathology A form of colorblindness in which only two of the three fundamental colors can be distinguished due to a lack of one of the cone pigments.
【病理学】 二色性：一种色盲形成，由于缺乏某一锥状色素，只能从三种原色中区别两种颜色