dichromacy

Từ điển Oxford Learners Wordfinder Dictionary

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)
• Syn:
dichromatism, dichromatopsia, dichromia, dichromasy
• Derivationally related forms:
dichromatic (for: dichromatism)
• Hypernyms:
color blindness, colour blindness, color vision deficiency, colour vision deficiency
• Hyponyms:
red-green dichromacy, red-green color blindness, red-green colour blindness, yellow-blue dichromacy, yellow-blue color blindness