Definition of "epidermal" [ep•i•der•mal]

• Of or pertaining to the epidermis. (adjective)

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• "It was already known that a genetic defect in the coding for epidermal growth factor receptor EGFR, a cell-surface receptor for a hormone known as epidermal growth factor, plays a role in about one-third of glioblastoma cases."
• "As serendipity would have it, scientists at Australia's Commonwealth Scientific and Industrial Research Organization discovered 10 years ago that a natural animal protein, called epidermal growth factor (EGF), makes fleece fall off sheep like butter off a hot knife."
• "Both Erbitux and Vectibix target what scientists call epidermal growth-factor receptors, or EGFRs, which sit on the surface of cells."