car·a·cole /ˈkærəˌkol/
  半旋轉;螺旋樓梯
  Car·a·cole n.
  1. Man. A half turn which a horseman makes, either to the right or the left.
  2. Arch. A staircase in a spiral form.
  En caracole , spiral; -- said of a staircase.
  Car·a·cole v. i. [imp. & p. p. Caracoled ]  Man. To move in a caracole, or in caracoles; to wheel.
     Prince John caracoled within the lists.   --Sir W. Scott.
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  caracole
       v : make a half turn on a horse, in dressage