Increased skin pigmentation, darkening of the skin. This is directly due to an increased amount of melanin pigment in the skin when there is increased production of melanin by the melanocytes (the cells that make melanin) or if there is a rise in the number of melanocytes. Melanoderma comes from the Greek "melas", black + "derma", skin = black skin.
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1. An abnormal darkening of the skin by deposition of excess melanin. 2. Hyperpigmentation of the skin by melanin or deposition of dark substances such as silver, iron, and drug derivatives. [melano- + G. derma, skin]
- m. cachecticorum m. of the cachectic, occurring in certain chronic diseases, such as malaria and tuberculosis.
- parasitic m. excoriations and m. caused by scratching the bites of the body louse, Pediculus corporis. SYN: vagabond's disease, vagrant's disease.
- racial m. the normally dark skin of members of some nonwhite races.
- senile m. cutaneous pigmentation occurring in the aged. SYN: melasma universale.

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mel·a·no·der·ma .mel-ə-nō-'dər-mə, mə-.lan- n abnormally intense pigmentation of the skin
mel·a·no·der·mic -'dər-mik adj

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mel·a·no·der·ma (mel″ə-no-durґmə) [melano- + derma] abnormally increased melanin in the skin, with hyperpigmented patches; it may be due either to increased production by the melanocytes that are normally present or to increased absolute numbers of melanocytes.

Medical dictionary. 2011.

Look at other dictionaries:

  • Melanodérma — (Melasma, griech.; lat. Nigrities cutis), mehr oder weniger ausgedehnte schwärzliche Hautfärbung, tritt überall auf, wo längere Zeit eine Blutüberfüllung der Haut bestand, und erklärt sich durch Ablagerung von Blutfarbstoff in die Haut. Man… …   Meyers Großes Konversations-Lexikon

  • melanoderma — adj. abnormally dark skin as a result of increased deposits of melatonin …   English contemporary dictionary

  • melanoderma — mel·a·no·der·ma …   English syllables

  • melanoderma — noun abnormally dark skin caused by increased deposits of melatonin • Hypernyms: ↑pigmentation …   Useful english dictionary

  • parasitic melanoderma — vagabond s disease …   Medical dictionary

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  • Vagabond's disease — Parasitic melanoderma (commonly known as Vagabond s disease, vagrant s disease and Greenhow s disease) is an exacerbation of body lice (scientifically referred to as Pediculosis )cite web last = University of Newcastle upon Tyne first =… …   Wikipedia

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