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The Collaborative International Dictionary of English v.0.48 (gcide)

Melanin \Mel"a*nin\, n. [Gr. me`las, me`lanos, black.]
(Physiol.)
A black pigment found in the pigment-bearing cells of the
skin (particularly in the skin of the negro), in the
epithelial cells of the external layer of the retina (then
called {fuscin}), in the outer layer of the choroid, and
elsewhere. It is supposed to be derived from the
decomposition of hemoglobin.
[1913 Webster]

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