Definition of red-blindness in English:

red-blindness

noun

Physiology Medicine
  • A form of abnormal colour vision characterized by reduced perception of light at the red end of the spectrum; = "protanopia". Also: colour vision or photosensitivity of this kind as a normal characteristic of a species.

Origin

Mid 19th century. From red + blindness, after German Rothblindheit. Compare slightly later red-blind.

Pronunciation

red-blindness

/ˈrɛdˌblʌɪn(d)nɪs/