Medical Terminology


Keratin, highly fibrous and resistant protein that makes up most of the material in the cells forming the epidermis, hair, nails, scales, feathers, beaks, horns, and hooves of animals. Keratinization is the deposition of keratin in skin cells, e.g. in hair and nails, giving them the texture of horn. Excessive keratinization may lead to keratodermia, thickening of the outer layer of the skin, occurring sometimes in symmetrically placed patches on the palms and soles.

Related Concepts

body process