| racial stocks | Major living subspecies of man differentiated by genetic and physical characteristics. There are four racial groups: australoid, caucasoid, mongoloid, and negroid. (12 Dec 1998) |
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| parasitic melanoderma | Excoriations and melanoderma caused by scratching the bites of the body louse, Pediculus corporis. Synonym: Greenhow's disease, vagabond's disease, vagrant's disease. Racial melanoderma, the normally dark skin of blacks and certain other races. Senile melanoderma, cutaneous pigmentation occurring in the aged. Synonym: melasma universale. (05 Mar 2000) |
| melanoderma | 1. An abnormal darkening of the skin by deposition of excess melanin. 2. Hyperpigmentation of the skin by melanin or deposition of dark metallic substances such as silver and iron. Origin: melano-+ G. Derma, skin Melanoderma cachecticorum, melanoderma of the cachectic, occurring in certain chronic diseases, such as malaria and tuberculosis. (05 Mar 2000) |
| melanoderma chloasma | <medicine> A dark discolouration of the skin, usually local; as, Addison's melasma, or Addison's disease. Melasmic. Origin: NL, fr. Gr. Black spot. Source: Websters Dictionary (01 Mar 1998) |