Definitions

1. verb

to become or cause something to become keratin, especially to form keratin in the skin, hair, or nails, as a result of a process such as drying, hardening, or maturation

“The skin keratinizes in response to the sun’s UV radiation, forming a protective barrier.”

2. verb

to produce or cause the formation of keratin, especially in the skin, hair, or nails

“The process of keratinization is essential for the health of human hair and nails.”