vellication
  抽筋
  Vel·li·ca·tion
  1. The act of twitching, or of causing to twitch.
  2. Med. A local twitching, or convulsive motion, of a muscular fiber, especially of the face.
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  vellication
       n : a sudden muscle spasm; especially one caused by a nervous
           condition [syn: twitch, twitching]