单词	radon
释义	radon noun ra·​don ˈrā-ˌdän  : a heavy radioactive gaseous element formed by the decay of radium see Chemical Elements Table Example Sentences Recent Examples on the Web August is awareness month for glaucoma, birth defects prevention, cervical health, radon and thyroids. Scott Lafee, San Diego Union-Tribune, 2 Aug. 2022 Thawing Arctic permafrost will expose local populations to more radon, and the iodine of desert dust may decrease ozone pollution but increase greenhouse gas longevity. Rafil Kroll-zaidi, Harper’s Magazine , 25 May 2022 The report also recommended that all results of radon tests conducted on Utah structures be reported to DEQ and put on an online database. Brian Maffly, The Salt Lake Tribune, 20 May 2022 The radiological team charged with looking for both radiation and radon has concluded. Caitlin O'kane, CBS News, 25 Apr. 2022 The Marion County Public Health Department offers free radon testing for county residents. Sarah Bowman, The Indianapolis Star, 17 Nov. 2021 The spring water in Tskaltubo is said to have a high level of radon, which has long been believed to decrease inflammation. Jamie Ditaranto, Condé Nast Traveler, 28 Sep. 2021 The average level of indoor radon in the U.S. is 1.3 picocuries per liter. Austen Erblat, sun-sentinel.com, 2 Sep. 2021 With federal assistance, Florida has acted on the recommendations of dozens of local health departments to investigate environmental pollution, like groundwater contamination or radon levels in the air. Lulu Ramadan, ProPublica, 22 Aug. 2021 See More Word History Etymology International Scientific Vocabulary, from radium First Known Use 1918, in the meaning defined above Medical Definition radon noun ra·​don ˈrā-dän  : a heavy radioactive gaseous element of the group of inert gases formed by disintegration of radium and used similarly to radium in medicine —symbol Rn called also radium emanation see Chemical Elements Table
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