ra·​dio·​nu·​clide ˌrā-dē-ō-ˈnü-ˌklīd How to pronounce radionuclide (audio)
: a radioactive nuclide

Examples of radionuclide in a Sentence

Recent Examples on the Web Organisms that live in or on sediment, such as worms, shellfish, and bottom feeders, could be exposed to high radionuclide concentrations. IEEE Spectrum, 11 Jan. 2012 Accumulation of radionuclides in marine sediment is the main concern, says Buesseler. IEEE Spectrum, 11 Jan. 2012 After a nuclear weapon test, for example, particles and gases from an explosion called nuclear fallout contaminate the environment and leave lingering radionuclides—atoms with unstable nuclei. Margaret Osborne, Smithsonian Magazine, 29 Aug. 2023 The process will remove almost all radionuclides from the wastewater, apart from tritium – a naturally occurring form of hydrogen that is the weakest of all of radioactive isotopes. Kathleen Magramo, CNN, 27 Aug. 2023 These radionuclides then accumulate over time, eventually reaching levels high enough to damage DNA and RNA cells if ingested through seafood, such as oysters and lobsters, Richmond said. Amudalat Ajasa, Washington Post, 22 Aug. 2023 Conrad is currently analyzing desert tortoise samples from southwestern Utah, collected by Berry, to better relate exposure to radionuclides (like uranium) to their diets over the course of their lives. Celia Ford, WIRED, 30 Aug. 2023 In the past, measuring radionuclides in animals has been challenging, writes Jake Buehler for New Scientist. Margaret Osborne, Smithsonian Magazine, 29 Aug. 2023 Bob Richmond, a research professor at the University of Hawai‘i at Mānoa and director of the Kewalo Marine Laboratory, said the contamination from radionuclides in the waste water could transfer from the bottom of the food web through small organisms like phytoplankton to the largest, such as tuna. Amudalat Ajasa, Washington Post, 22 Aug. 2023

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Word History

First Known Use

1947, in the meaning defined above

Time Traveler
The first known use of radionuclide was in 1947

Dictionary Entries Near radionuclide

Cite this Entry

“Radionuclide.” Dictionary, Merriam-Webster, Accessed 21 Jun. 2024.

Medical Definition


ra·​dio·​nu·​clide -ˈn(y)ü-ˌklīd How to pronounce radionuclide (audio)
: a radioactive nuclide
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