having two colors. / (pathology) having a form of colorblindness in which only two of the three primary colors can be distinguished

In a dichromatic way.

One whose vision exhibits dichromacy; one who can distinguish only two primary colors.

plural of dichromat

The condition of being dichromatic / (pathology) A form of colourblindness in which only two of the three primary colours can be distinguished

plural of dichromatism

plural of sexual dichromatism

A plumage or fur color difference between male and female individuals of the same species.