ter·a·to·ma /ˌtɛrəˈtomə/
  ter·a·to·ma /ˌtɛrəˈtomə/ 名詞
  畸胎瘤
  Ter·a·to·ma n.  Med. A tumor, sometimes found in newborn children, which is made up of a heterigenous mixture of tissues, as of bone, cartilage and muscle.
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  teratoma
       n : a tumor consisting of a mixture of tissues not normally
           found at that site