keratin or ceratin (ˈkɛrətɪn) ![[Click for IPA pronunciation guide]](http://sp.dictionary.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc | |
| ceratin or ceratin | |
| —n | |
| ceratin | |
noun | |
| 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] |
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