Transepidermal Water Loss (TEWL) is a term associated with dermatology and connected sciences. Dermatology (from Greek derma, skin) is a branch of medicine dealing with the skin and its appendages (hair, nails, sweat glands etc). ...

It is defined as the measurement of the quantity of water that passes from inside a body (animal or plant) through the epidermal layer (skin) to the surrounding atmosphere via diffusion and evaporation processes. Epidermis is the outermost layer of the skin. ... This article or section does not cite its references or sources. ... This article or section is in need of attention from an expert on the subject. ...