melanism(n = noun.state) melanosis - a condition characterized by abnormal deposits of melanin (especially in the skin);
is a kind of disease of the skin, skin disease, skin disorder
1. An undue development of dark-colored pigment in the skin or its appendages; -- the opposite of
2. A disease; black jaundice. See Melæna. [1913 Webster]
The character of having a high degree of pigmentation, as shown in dark skin, eyes, and hair. [Webster 1913 Suppl.]
melanism, n. an unusual darkening of body tissues caused by excessive production of melanin.