roentgen

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• March 2. 2016 from wordnet.princeton.edu

  Roentgen — noun — english

  German physicist who discovered x-rays and developed roentgenography (1845-1923)

• December 3. 2013 from wordnet.princeton.edu

  roentgen — noun — english

  a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air