radioisotope

noun
ra·​dio·​iso·​tope | \ ˌrā-dē-ō-ˈī-sə-ˌtōp How to pronounce radioisotope (audio) \

Definition of radioisotope

: a radioactive isotope

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Other Words from radioisotope

radioisotopic \ ˌrā-​dē-​ō-​ˌī-​sə-​ˈtä-​pik How to pronounce radioisotope (audio) , -​ˈtō-​ \ adjective
radioisotopically \ ˌrā-​dē-​ō-​ˌī-​sə-​ˈtä-​pi-​k(ə-​)lē How to pronounce radioisotope (audio) \ adverb

Examples of radioisotope in a Sentence

Recent Examples on the Web Voyager and many satellites already use radioisotope thermoelectric generators (RTGs). Caroline Delbert, Popular Mechanics, "Could a Nuclear Reactor Actually Last for Hundreds of Years?," 9 Feb. 2021 With a chemical makeup similar to calcium, strontium-90, a radioisotope found in fallout, is easily absorbed in teeth and bones. Longreads, "The Grieving Landscape," 10 Aug. 2020 Iodine 131 is a radioisotope created as a result of nuclear fission, which is why scientists believe the radiation release is the result of an accident at a nuclear facility. Kyle Mizokami, Popular Mechanics, "Radiation Leak in Europe Points to a Possible Russian Weapons Test," 29 June 2020 Voyager 1, Voyager 2, Cassini, and New Horizons all used a radioisotope power source but used hydrazine fuel in a chemical engine that quickly flung them to the far reaches of the solar system. Smithsonian Magazine, "Astronomers Prepare a Mission Concept to Explore the Ice Giant Planets," 8 Jan. 2020 The major breakthrough is the radioisotope identification device in Tang’s pocket, the D3S, which was built by the British company Kromek. Dan Dubno, Popular Mechanics, "This Tiny Device Can Detect Nuclear Armageddon," 25 Apr. 2019 Curiously, the radioisotope levels found in Naen island’s soils — located around 100 miles away — were roughly the same as those found at the Castle Bravo explosion site. Susanne Rust, Los Angeles Times, "Radiation in parts of the Marshall Islands is far higher than Chernobyl, study says," 15 July 2019 Curiously, the radioisotope levels found in Naen island’s soils — located around 100 miles away — were roughly the same as those found at the Castle Bravo explosion site. Susanne Rust, latimes.com, "Radioactivity in parts of the Marshall Islands is far higher than Chernobyl, study says," 15 July 2019 Plutonium-238 is a radioisotope associated with nuclear waste and not generally with fallout, said Ivana Nikolic Hughes, a co-author of the research and an associate professor of chemistry at Columbia. Susanne Rust, Los Angeles Times, "Radiation in parts of the Marshall Islands is far higher than Chernobyl, study says," 15 July 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radioisotope.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of radioisotope

1938, in the meaning defined above

History and Etymology for radioisotope

International Scientific Vocabulary

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Time Traveler for radioisotope

Time Traveler

The first known use of radioisotope was in 1938

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Statistics for radioisotope

Last Updated

14 Mar 2021

Cite this Entry

“Radioisotope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radioisotope. Accessed 7 May. 2021.

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More Definitions for radioisotope

radioisotope

noun
ra·​dio·​iso·​tope | \ ˌrād-ē-ō-ˈī-sə-ˌtōp How to pronounce radioisotope (audio) \

Medical Definition of radioisotope

: a radioactive isotope — compare radioelement

Other Words from radioisotope

radioisotopic \ -​ˌī-​sə-​ˈtäp-​ik, -​ˈtōp-​ik How to pronounce radioisotope (audio) \ adjective
radioisotopically \ -​i-​k(ə-​)lē How to pronounce radioisotope (audio) \ adverb

More from Merriam-Webster on radioisotope

Britannica English: Translation of radioisotope for Arabic Speakers

Britannica.com: Encyclopedia article about radioisotope

Comments on radioisotope

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