roentgen
English Thesaurus
1. German physicist who discovered x-rays and developed roentgenography (1845-1923) (noun.person)
| instance hypernym | : | physicist, |
| definition | : | a scientist trained in physics (noun.person) |
2. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air (noun.quantity)
| hypernym | : | radioactivity unit, |
| definition | : | a measure of radioactivity (noun.quantity) |
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