The Collaborative International Dictionary of English v.0.48:

Epidermic \Ep`i*der"mic\, a. [Cf. F. ['e]pidermique.]
   Epidermal; connected with the skin or the bark.
   [1913 Webster]

   Epidermic administration of medicine (Med.), the
      application of medicine to the skin by friction.
      [1913 Webster]