tu·ni·cle /ˈtunɪkəl, ˈtju-/
  法衣
  Tu·ni·cle n.
  1. A slight natural covering; an integument.
     The tunicles that make the ball or apple of the eye.   --Holland.
  2. R. C. Ch. A short, close-fitting vestment worn by bishops under the dalmatic, and by subdeacons.
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