Melanism

Mel″a‐nism (mĕl″ȧ‐nĭz'm), n. [Gr. μέλασ, -ανοσ, black.]

1. An undue development of dark-colored pigment in the skin or its appendages; — the opposite of albinism.

2. (Med.) A disease; black jaundice. See Melæna.