Definitions
a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves
Word origin
Borrowed from German Keratin, from Ancient Greek κέρας (kéras, “horn”) + -in. Doublet of carat.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Hair protein”7 letters
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