otoscope
  耳鏡
  oto·scope /ˈotəˌskop/ 名詞
  (檢)耳鏡
  O·to·scope n.  An instrument for examining the condition of the ear.
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  otoscope
       n : medical instrument consisting of a magnifying lens and
           light; used for examining the external ear (the auditory
           meatus and especially the tympanic membrane)