ceratin

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Hypernyms:
scleroprotein, albuminoid
• Substance Holonyms:
horn, hair, feather, plume, plumage