| 单词 | roentgen |
| 释义 | roentgen (once / 200328 pages) n WORD FAMILY roentgen: roentgens USAGE EXAMPLESBut it is time for the country to give up on the curie, the roentgen, the rad and the rem. Nature(Sep 12, 2016) "He must have taken enough roentgens of gamma and neutrons to reach or exceed the median-lethal dose." Goodwin, Harold L. (Harold Leland), Rip Foster Rides the Gray Planet(2010) "He must have taken enough roentgens of gamma and neutrons to reach or exceed the median-lethal dose." Goodwin, Harold L. (Harold Leland), Rip Foster in Ride the Gray Planet(2010) n a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air Syn|Hyper R radioactivity unit a measure of radioactivity Roentgen (once / 88867 pages) n WORD FAMILY Roentgen: Roentgens USAGE EXAMPLESRoentgen’s report prompted the Parisian physicist Henri Becquerel to look for other signs of X-rays. Michael Hiltzik, Big Science(2015) It was on this day 120 years ago—Jan. 5, 1896—that an Austrian newspaper first reported Roentgen’s discovery. Time(Jan 05, 2016) Wilhelm Roentgen accidentally discovered X-rays that year, and Henri Becquerel discovered radioactivity in uranium salts. New York Times(Jun 19, 2015) n German physicist who discovered x-rays and developed roentgenography (1845-1923) Syn|Exp Rontgen, Wilhelm Konrad Roentgen, Wilhelm Konrad Rontgen physicist a scientist trained in physics |
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