1) Biological process 2) Keratinisation 3) Organic process 1) Keratinisation 
Keratin formation or development of a horny layer; may also apply to premature formation of keratin. ... Synonym: cornification, hornification. ... (05 Mar 2000) ... 
(ker″ә-tin″ĭ-za´shәn) the development of or conversion into keratin.
Type: Term Pronunciation: ker′ă-tin′i-zā′shŭn Definitions: 1. Keratin formation or development of a horny layer; may also apply to premature formation of keratin. Synonyms: cornification
The process whereby keratinocytes in the epidermis mature to form the outer, horny layer of the skin.
[n] - organic process by which keratin is deposited in cells and the cells become horny (as in nails and hair)
keratinization 1. The development of or conversion into keratin; as in the development of a horny layer of tissue. 2. A process occurring in vertebrate epidermis and epidermal structures in which keratin replaces the cytoplasm of a cell. An example of keratinization is the cornified outer layer of the epidermis of the skin that consists of dead h...