monochromatism

Từ điển Oxford Learners Wordfinder Dictionary

noun

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