roent·gen /ˈrɛntgən, ˈrʌnt, ʤən, ʃən/
  人名;德國物理學家
  roent·gen /ˈrɛntgən, ˈrənt, ʤən; ˈrɛnʧən, ˈrən-/ 形容詞
  Rönt·gen, Roent·gen a. Of or pertaining to the German physicist Wilhelm Konrad Röntgen, or the rays discovered by him; as, Röntgen apparatus.
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  roentgen
       n 1: a unit of radiation exposure; the dose of ionizing radiation
            that will produce 1 electrostatic unit of electricity in
            1 cc of dry air [syn: R]
       2: German physicist who discovered x-rays and developed
          roentgenography (1845-1923) [syn: Wilhelm Konrad Roentgen,
           Rontgen, Wilhelm Konrad Rontgen]