roentgen

(noun) a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air. Synonyms: R.

(noun) German physicist who discovered x-rays and developed roentgenography (1845-1923). Synonyms: Roentgen, Wilhelm Konrad Roentgen, Rontgen, Wilhelm Konrad Rontgen.