melanuria

[ mĕl′ə-nurē-ə ]

n.

The excretion of urine of a dark color, resulting from the presence of melanin or other pigments or from the action of coal tar derivatives.

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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.