Definitions

from The Century Dictionary and Cyclopedia

  • n. The proper substance of horn or horny tissue; the organic substance of the ceratina, entering largely into the composition of epithelial or cuticular structures, as horns, hoofs, nails, etc. Also keratin, keratine.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a fibrous scleroprotein that occurs in the outer layer of the skin and in horny tissues such as hair, feathers, nails, and hooves

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