1 文書を見つけるための辞書。

• ceratin, keratin
• ケラチン
• a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves
• 皮膚の最外層や髪の毛、羽、爪、ひづめなど角状の組織に生じる