n 1: a fibrous scleroprotein that occurs in the outer layer of
the skin and in horny tissues such as hair, feathers,
nails, and hooves [syn: keratin, ceratin]
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n 1: a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves [syn: keratin, ceratin]