Epidermally refers to anything that relates to the outermost layer of the skin, the epidermis. Some synonyms for epidermally include superficially, cutaneously, dermally, and ectodermally. Superficially refers to something that is near the surface or only skin-deep. Cutaneously describes something that affects the skin, while dermally refers to any type of treatment or product that is applied topically to the skin. Finally, ectodermally describes something that develops from the outermost layer of cells during embryonic growth. Each of these words can be used interchangeably with the word epidermally, depending on the context in which they are used.