melanoderma
(mĕl′ə-nō-dûr′mə)- An abnormal darkening of the skin caused by deposition of excess melanin or of metallic substances.
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The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for melanoderma
Historical Examples
The color is yellowish, or brownish, and may even be blackish (melasma, melanoderma).
Essentials of Diseases of the SkinHenry Weightman Stelwagon