Definitions for keratinˈkɛr ə tɪn

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

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

GCIDE

  1. keratin(n.)

    A sulfur-containing fibrous protein constituting the main structural protein of hard epidermal tissues, such as horn, hair, feathers, nails, claws, hoofs, 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 leucine and tyrosine plus various other acid-stable amino acids. The amino acid composition varies, but it usually has a high percentage of cystine, which stabilizes and insolubilizes the protein by forming intrachain linkages. A softer form of keratin is present in the epidermis and whalebone. Called also epidermose.

  2. Origin: [Gr. ke`ras, -atos, horn.]

Wiktionary

  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

  2. Origin: [Gr. ke`ras, -atos, horn.]

Freebase

  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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