circumduction
  環行運動
  cir·cum·duc·tion /ˌsɝkəmˈdəkʃən/ 名詞
  環行(運動)
  Cir·cum·duc·tion n.
  1. A leading about; circumlocution. [R.]
  2. An annulling; cancellation. [R.]
  3. Physiol. The rotation of a limb round an imaginary axis, so as to describe a conical surface.
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  circumduction
       n : a circular movement of a limb or eye