trans·der·mal /træn(t)sˈdɝməl, trænz-/
  trans·der·mal /ˌtræn(t)sˈdɝməl, ˌtrænz-/ 形容詞
  經皮的,經皮膚
  transdermal
       adj : through the unbroken skin; refers to medications applied
             directly to the skin (creams or ointments) or in
             time-release forms (skin patches); "transdermal
             estrogen"; "percutaneous absorption" [syn: transdermic,
              percutaneous, transcutaneous]