名詞 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)
   同義詞：dichromacy, dichromatopsia, dichromia, dichromasy

di.chro.ma.tism

n.（名詞）
The quality or condition of being dichromatic.
二色性：呈現(xiàn)二色性的狀態(tài)或情狀
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.
【病理學】 二色性：一種色盲形成，由于缺乏某一錐狀色素，只能從三種原色中區(qū)別兩種顏色