1) Color 2) Color blindness 3) Color vision deficiency 4) Colour blindness 5) Colour vision deficiency 6) Dichromasy 7) Dichromatism 8) Dichromatopsia 9) Dichromia 1) Dichromasy 2) Dichromatism 3) Dichromatopsia 4) Dichromia 
Dichromacy (di meaning `two` and chroma meaning `color`) is the state of having two types of functioning color receptors, called cone cells, in the eyes. Organisms with dichromacy are called dichromats. Dichromats can match any color they see with a mixture of no more than two pure spectral lights. By comparison, trichromats require three pure...
(di-kro´mә-se) dichromatic vision.
[n] - 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)
dichromatism noun 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)