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| roent·gen [ réntgən, réntjən ] (plural roent·gens) or rönt·gen [ réntgən, réntjən ] (plural rönt·gens) |
noun |
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| Definition: |
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unit of radiation dosage: a unit of radiation, used to measure the exposure of somebody or something to X-rays and gamma rays, defined in terms of the ionization effect on air. It is equal to the quantity of radiation that produces ionization equal to one electrostatic unit of charge at 0° and standard atmospheric pressure.
Symbol R
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| [Late 19th century. After W. C. Roentgen] |
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