definition of
roentgen

[1] #1 roentgen n. [R] a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air. wn

[2] #2 roentgen n. [Roentgen, Wilhelm Konrad Roentgen, Rontgen, Wilhelm Konrad Rontgen] German physicist who discovered x-rays and developed roentgenography (1845-1923). wn