1) Color 2) Color blindness 3) Color vision deficiency 4) Colour blindness 5) Colour vision deficiency 6) Complete color blindness 7) Monochromasy 8) Monochromatic vision 9) Monochromatism 10) Monochromia 1) Monochromasy 2) Monochromatism 3) Monochromia 
Monochromacy (mono meaning one and chromo color) is, among animals, the condition of possessing only one type of cone cell for color vision, which results in a monochromatic-like (in most cases black and white) vision.{clarify | reason = Does `in most cases black and white` imply that some monochromatic subjects perceive everything in shades of .....
[n] - complete color blindness
monochromatism noun complete color blindness; colors can be differentiated only on the basis of brightness