CERATIN

World English Dictionary
keratin or ceratin (ˈkɛrətɪn)
 
n
a fibrous protein that occurs in the outer layer of the skin and in hair, nails, feathers, hooves, etc
 
ceratin or ceratin
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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WordNet
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
WordNet® 3.0, © 2006 by Princeton University.
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