epidermis
n. C / U C1 Advanced US //ˌɛpəˈdɝməs// UK //ˌɛpɪdˈɜːmɪs// epi·der·mis
n. the outermost layer of the skin. It is the thin, protective layer that you can see and touch.
n. the outermost of the three layers of the skin, consisting of stratified squamous epithelium. It provides a waterproof barrier and protects against environmental damage.
The epidermis is the thin layer on the surface of your skin.
When you get a sunburn, the epidermis is the layer that becomes red and painful.
The epidermis is constantly renewing itself through a process of cell division and migration, eventually shedding dead skin cells to maintain a healthy barrier against pathogens.
Borrowed from Latin epidermis, from Ancient Greek ἐπιδερμίς (epidermís), ἐπί (epí, “on top of”) + δέρμα (dérma, “skin”). Equivalent to epi- + dermis.