noun
- A cell that produces keratin and forms the main structural component of the epidermis (outer layer of skin).
Usage: technical; biology/medicine
Examples
- Keratinocytes make up approximately 90% of the cells in the epidermis.
- The sun's UV rays can damage keratinocytes and increase the risk of skin cancer.
- Keratinocytes produce keratin, a tough protein that protects the skin.
- When keratinocytes are damaged, the skin's barrier function is compromised.
- Dermatologists study keratinocytes to understand how skin heals after injury.