melanopathy
1melanopathy — Any disease marked by abnormal pigmentation of the skin. [melano + G. pathos, suffering] …
2melanin — n. dark or black pigment of body. ♦ melanian, ♦ melanic, adj. dark skinned. ♦ melaniferous, adj. containing melanin. ♦ melanism, n. abnormal blackness of skin or plumage; extreme darkness of complexion and hair. ♦ melano, n.… …