What is medical term for the skin layer upon the dermis?

The medical term for the skin layer above the dermis is the "epidermis." The epidermis is the outermost layer of the skin, providing a protective barrier and playing a critical role in preventing water loss and protecting against environmental factors. It is composed mainly of keratinocytes, which produce the protein keratin, and is also home to melanocytes, which produce the pigment melanin.