keratin=الكيراتين

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keratin=الكيراتين

ONLINE ETYMOLOGY DICTIONARY:

keratin (n.)

basic substance of horns, nails, feathers, etc., 1847, from Gk. keras (gen. keratos) "horn" (see kerato-) + chemical suffix -in (2).

kerato-

before vowels, kerat-, word-forming element meaning "horn, horny," from Gk. keras (gen. keratos) "horn," from PIE *ker- "horn, head.