(n.) The state of being dichromatic.

Christmas disease Daltonism Hartnup disease Werdnig-Hoffmann disease achromatic vision achromatopsia albinism cystic fibrosis deuteranopia dichromatic vision dichromatism dysautonomia green blindness hemophilia ichthyosis mongolianism mongolism monochromatism mucoviscidosis muscular dystrophy pancreatic fibrosis protanopia red-green blindness sickle-cell anemia thalassemia tritanopia violet-blindness xanthocyanopia yellow blindness