Keratin :: Keratin (n.) 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..

Keratitis :: Keratitis (n.) Inflammation of the cornea.

Keratode :: Keratode (n.) See Keratose.

Keratogenous :: Keratogenous (a.) Producing horn; as, the keratogenous membrane within the horny hoof of the horse..

Keratoidea :: Keratoidea (n. pl.) Same as Keratosa.

Keratome :: Keratome (n.) An instrument for dividing the cornea in operations for cataract.

Keratonyxis :: Keratonyxis (n.) The operation of removing a cataract by thrusting a needle through the cornea of the eye, and breaking up the opaque mass..

Keratophyte :: Keratophyte (n.) A gorgonian coral having a horny axis.

Keratosa :: Keratosa (n. pl.) An order of sponges having a skeleton composed of hornlike fibers. It includes the commercial sponges.

Keratose :: Keratose (n.) A tough, horny animal substance entering into the composition of the skeleton of sponges, and other invertebrates; -- called also keratode..

Keratose :: Keratose (a.) Containing hornlike fibers or fibers of keratose; belonging to the Keratosa.

Neurokeratin :: Neurokeratin (n.) A substance, resembling keratin, present in nerve tissue, as in the sheath of the axis cylinder of medullated nerve fibers. Like keratin it resists the action of most chemical agents, and by decomposition with sulphuric acid yields leucin and tyrosin..

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