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

Definition of radioisotope

: a radioactive isotope

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 Though the presence of this radioisotope in sediment does not neatly translate into contamination in soil or food, the finding does suggest the possibility of danger to ecosystems and people. Hart Rapaport, Scientific American, 4 Apr. 2022 Job description: Prepare, administer, and measure radioactive isotopes in therapeutic, diagnostic, and tracer studies using a variety of radioisotope equipment. Zachary Smith, cleveland, 29 Mar. 2022 Personnel remain at the facility, which is used for research, development and radioisotope production for medical and industrial applications. NBC News, 18 Mar. 2022 Most recently, the lab helped power NASA's Mars rover Perseverance with a radioisotope power system, which converts heat generated by the natural decay of plutonium-238 into electrical power. Keith Ridler, ajc, 19 Nov. 2021 As a proof of principle, Cederwall and colleagues focused on detection of californium-252, a readily available radioisotope widely used as a proxy for weapons-grade plutonium. Richard Stone, Science | AAAS, 19 May 2021 Voyager and many satellites already use radioisotope thermoelectric generators (RTGs). Caroline Delbert, Popular Mechanics, 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, 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, 29 June 2020 See More

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.

First Known Use of radioisotope

1938, in the meaning defined above

History and Etymology for radioisotope

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Time Traveler for radioisotope

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The first known use of radioisotope was in 1938

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Cite this Entry

“Radioisotope.” Dictionary, Merriam-Webster, Accessed 26 Jun. 2022.

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More Definitions for radioisotope


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 Encyclopedia article about radioisotope


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