keratin

(kerə tin)

noun

a tough, fibrous, insoluble protein forming the principal matter of hair, nails, horn, etc.

Origin: kerat(o)- + -in

Related Forms:

See keratin in American Heritage Dictionary 4

noun
A tough, insoluble protein substance that is the chief structural constituent of hair, nails, horns, and hooves.

Origin:

Origin: Greek keras, kerāt-, horn; see ker-1 in Indo-European roots

Origin: + -in

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Related Forms:

  • ke·ratˈi·nous (kə-rătˈn-əs) adjective

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keratin

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