Translations:Dictionary:Roentgen/1/en
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{{#category_index:R|roentgen}} (rent’ g∂n or rent’ j∂n) The quantity of radiation that will produce one electrostatic unit of charge (2.08×109 ion pairs) per cm3 in air at STP. The maximum safe human dosage is about 300 mR/week. Named for Wilhelm Konrad Roentgen (1845–1923), German physicist.