Definitions for keratinˈkɛr ə tɪn

This page provides all possible meanings and translations of the word keratin

Random House Webster's College Dictionary

ker•a•tinˈkɛr ə tɪn(n.)

  1. a tough, insoluble protein that is the main constituent of hair, nails, horn, hoofs, etc., and of the outermost layer of skin.

    Category: Biochemistry

Origin of keratin:

1840–50; < Gk kerat-, s. of kérashorn+ -in1

ke•rat•i•nouskəˈræt n əs(adj.)

Princeton's WordNet

  1. keratin, ceratin(noun)

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


  1. keratin(Noun)

    A protein which hair and nails are comprised of.

Webster Dictionary

  1. Keratin(noun)

    a nitrogenous substance, or mixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decomposition with sulphuric acid it yields leucin and tyrosin, as does albumin. Called also epidermose


  1. Keratin

    Keratin is a family of fibrous structural proteins. Keratin is the key structural material making up the outer layer of human skin. It is also the key structural component of hair and nails. Keratin monomers assemble into bundles to form intermediate filaments, which are tough and insoluble and form strong unmineralized tissues found in reptiles, birds, amphibians, and mammals. The only other biological matter known to approximate the toughness of keratinized tissue is chitin.

The Nuttall Encyclopedia

  1. Keratin

    a substance forming the chief constituent in the hair, nails, and horn of animals.

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