melanism

noun

Dark coloration of the skin, hair, fur, or feathers because of a high concentration of melanin.

noun

In physiology, an undue development of coloring material in the skin and its appendages: the opposite of albinism; specifically, in zoology, the abnormal development of black or dark pigment in the pelage of a mammal or the plumage of a bird.

noun

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

noun

A disease; black jaundice. See Melæna.

noun

The character of having a high degree of pigmentation, as shown in dark skin, eyes, and hair.

noun

congenital excess of melanin pigmentation in the skin, hair, feathers and/or eyes; the condition of being melano

noun

a condition characterized by abnormal deposits of melanin (especially in the skin)