colour blindness
noun/ˈkʌlə blaɪndnəs/
/ˈkʌlər blaɪndnəs/
(US English color blindness)
[uncountable]- lack of the ability to see the difference between some colours, especially red and green; lack of the ability to see colours at all (although this is rare in humans)
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- the practice of treating people with different coloured skin in exactly the same way
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colour blindness