- black piedra
- piedra caused by Piedraia hortae, characterized by small black or brown gritty nodules on the shafts of the scalp hair; usually seen in tropical regions.
Medical dictionary. 2011.
black piedra
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piedra — A fungus disease of the hair characterized by the formation of numerous waxy, small, firm, nodular masses on the hair shaft. SEE ALSO: trichosporosis. [Sp. a stone] black p. p. involving the hairs of the scalp, caused by Piedraia hortae and… … Medical dictionary
piedra — n. a fungal disease of the hair in which the hair shafts carry hard masses of black or white fungus. The black fungus, Piedraia hortae, is found mainly in the tropics and the white varieties, Trichosporon species, in temperate regions … The new mediacal dictionary
piedra — (pe a drah) A fungal disease of the hair in which white or black nodules of fungi form on the shafts … Dictionary of microbiology
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white piedra — n a form of piedra that affects esp. the facial hairs and is caused by a fungus of the genus Trichosporan (T. beigelii) * * * piedra caused by Trichosporon beigelii, characterized by white to light brown nodules on the hair of the beard, axilla,… … Medical dictionary
