WordReference Random House Unabridged Dictionary of American English © 2026
col′or blind′ness,
- Ophthalmologyinability to distinguish one or several chromatic colors, independent of the capacity for distinguishing light and shade.
- Ophthalmologycomplete inability to distinguish colors of the spectrum, with all objects appearing as shades of gray, black, and white, varying only as to lightness and darkness;
achromatopsia. - 1835–45
'color blindness' also found in these entries (note: many are not synonyms or translations):