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radioactive
adjective
ra·dio·ac·tive ˌrā-dē-ō-ˈak-tiv 
1
: of, caused by, or exhibiting radioactivity
Radon is an odorless, colorless gas that arises naturally from the ground because of the decay of radioactive elements commonly found in rocks and many types of soil. In a chain of radioactive decay, uranium produces radium, which gives off radon, which in turn produces radioactive breakdown products that are harmful if inhaled.
Warren E. Leary
Warren E. Leary2
: so divisive or controversial as to require avoidance
He has been deemed radioactive by most charitable organizations … and organized competition, even local stuff, is largely closed off to him. Asher Price
Asher Price
Example Sentences
Uranium and plutonium are radioactive.
Recent Examples on the Web The doctor who finally entered the room was adorned in full personal protective gear — face shield, mask, gown, and gloves — and stood as far from the bed as possible, as if Ricky was somehow radioactive. Ofole Mgbako, STAT, 22 Aug. 2022 To create nuclear fission, atoms of radioactive elements like Uranium are broken apart with neutrons to release an enormous amount of energy. Sarah Wells, Popular Mechanics, 22 July 2022 In the early 1900s, scientists were on the hunt for new radioactive elements. Artemis Spyrou, The Conversation, 24 May 2022 Radon occurs naturally in the presence of radioactive elements, such as uranium and radium. Brian Maffly, The Salt Lake Tribune, 20 May 2022 And while a fission weapon uses radioactive elements like uranium and plutonium, the particles in a fusion process are hydrogen molecules. Katie Hafner, Scientific American, 21 Apr. 2022 The finding also means that there is more heat in Pluto's interior than astronomers previously thought, likely powered by the decay of radioactive elements in the dwarf planet's interior, per Linda Geddes for the Guardian. Corryn Wetzel, Smithsonian Magazine, 31 Mar. 2022 Without a constant flow of coolant to keep it from overheating, the radioactive material could evaporate and burn away its casing, releasing its toxic particles into the atmosphere. Tristan Bove, Fortune, 8 Aug. 2022 The shelling on Friday did not damage any of Zaporizhzhia’s six reactors and did not release radioactive material to the environment, according to Grossi, but the plant sustained damage elsewhere. Praveena Somasundaram, Washington Post, 6 Aug. 2022 See More
Ofole Mgbako, STAT, 22 Aug. 2022 To create nuclear fission, atoms of radioactive elements like Uranium are broken apart with neutrons to release an enormous amount of energy. Sarah Wells, Popular Mechanics, 22 July 2022 In the early 1900s, scientists were on the hunt for new radioactive elements. Artemis Spyrou, The Conversation, 24 May 2022 Radon occurs naturally in the presence of radioactive elements, such as uranium and radium. Brian Maffly, The Salt Lake Tribune, 20 May 2022 And while a fission weapon uses radioactive elements like uranium and plutonium, the particles in a fusion process are hydrogen molecules. Katie Hafner, Scientific American, 21 Apr. 2022 The finding also means that there is more heat in Pluto's interior than astronomers previously thought, likely powered by the decay of radioactive elements in the dwarf planet's interior, per Linda Geddes for the Guardian. Corryn Wetzel, Smithsonian Magazine, 31 Mar. 2022 Without a constant flow of coolant to keep it from overheating, the radioactive material could evaporate and burn away its casing, releasing its toxic particles into the atmosphere. Tristan Bove, Fortune, 8 Aug. 2022 The shelling on Friday did not damage any of Zaporizhzhia’s six reactors and did not release radioactive material to the environment, according to Grossi, but the plant sustained damage elsewhere. Praveena Somasundaram, Washington Post, 6 Aug. 2022 See More Word History
Etymology
International Scientific Vocabulary
First Known Use
1898, in the meaning defined at sense 1
Time Traveler
The first known use of radioactive was in 1898 adjective
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