monochromasy

Từ điển Oxford Learners Wordfinder Dictionary

noun

complete color blindness;
colors can be differentiated only on the basis of brightness
• Syn:
monochromacy, monochromatism, monochromatic vision, monochromia
• Derivationally related forms:
monochromatic (for: monochromatism)
• Hypernyms:
color blindness, colour blindness, color vision deficiency, colour vision deficiency