melanosis

n., pl., -ses (-sēz).
Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism. Also called melanism.

melanotic mel'a·not'ic (-nŏt'ĭk) adj.

(mel'ənō'sis)
n

The condition in which melanin pigments appear in the tissues. Melanosis is normal in the gingivae of most dark-skinned individuals and occasionally in those with light skin.

(mĕl'ə-nō'sĭs)
n.

Abnormally dark pigmentation of the skin or other tissues, resulting from a disorder of pigment metabolism. Also called melanism.

mel'a·not'ic (-nŏt'ĭk) adj.

1. a condition characterized by dark pigmentary deposits.
2. a disorder of pigment metabolism.

• m. coli — brown-black discoloration of the mucosa of the colon.
• congenital m. — patches of melanin in the capsule and stroma of the liver or lung in the neonate.
• liver m. — see hepatic lipofuscinosis.

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The noun has one meaning:

Meaning #1: a condition characterized by abnormal deposits of melanin (especially in the skin)
  Synonym: melanism

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