A follicular hyperkeratotic eruption thought to be due to deficiency of vitamin A. SYN: toad skin. [G. phrynos, toad, + derma, skin]
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phry·no·der·ma .frī-nə-'dər-mə n a rough dry skin eruption marked by keratosis and usu. associated with vitamin A deficiency called also toad skin
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phryno·der·ma (frin″o-durґmə) [Gr. phrynē toad + derma] follicular hyperkeratosis.Medical dictionary. 2011.