Akademik

melanonychia
Black pigmentation of the nails. [melano- + G. onyx (onych-), nail]

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n.
blackening of the nails with the pigment melanin.

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mel·a·no·nych·ia (mel″ə-no-nikґe-ə) [melan- + onychia] blackening of the nail by melanin pigmentation.

Medical dictionary. 2011.