Definition of Keratin
Keratin: Protein in the upper layer of the skin, hair, nails and animal horns. The word keratin comes from the Indo-European ker meaning horn.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=4091
Last Editorial Review: 3/26/1998 2:26:00 PM
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