Epidermal is a term that describe anything involving the epidermis or the outermost layer of the skin. The word can be divided into epi/derm/al. "Epi" is derived from Greek origins which means "upon" and "derma" means "skin". This is defined literally as "upon skin" or "on top of true skin", with the true skin being the dermis. The suffix "-al" is from the English language which means "pertaining to".
