Meaning of keratin

ker•a•tin

Pronunciation: (ker'u-tin), [key]
— n.
  1. a scleroprotein or albuminoid substance, found in the dead outer skin layer, and in horn, hair, feathers, hoofs, nails, claws, bills, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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