pleximeter
  叩診板
  plex·im·e·ter /plɛkˈsɪmətɚ/ 名詞
  Plex·im·e·ter n.  Med. A small, hard, elastic plate, as of ivory, bone, or rubber, placed in contact with body to receive the blow, in examination by mediate percussion. [Written also plexometer.]
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  pleximeter
       n : a small thin metal plate held against the body and struck
           with a plexor in percussive examinations [syn: plessimeter]