ra·dio·nu·clide | \ˌrā-dē-ō-ˈnü-ˌklīd, -ˈnyü-\

Definition of radionuclide 

: a radioactive nuclide

Examples of radionuclide in a Sentence

Recent Examples on the Web

Cobb explained that in the aftermath of this, the ongoing risk posed by radionuclides (notably, iodine-131 and cesium isotopes 134 and 137) depended on their half-lives. William Steel, Ars Technica, "Remediating Fukushima—“When everything goes to hell, you go back to basics”," 11 May 2018 At Hanford, the Energy Department does undertake environmental monitoring to measure radionuclide concentrations in the air, water, soils, fish and wildlife. Hal Bernton, The Seattle Times, "Study: Traces of radioactive contamination found in homes of six Hanford workers," 14 June 2018 Three reactor cores melted down, releasing radionuclides into the air and, ultimately, the groundwater. Allen Pierleoni,, "William T. Vollmann turns his mammoth talents to climate change," 11 May 2018 There are also 69 radionuclide stations that stand ready to catch any radioactive particles that float by as a result of nuclear tests or accidents. Rachel Becker, The Verge, "Meet the scientists keeping a global watch for nuclear explosions," 9 May 2018 Other radionuclides will perhaps remain in the region forever. Serhii Plokhy, Time, "The True Cost of the Chernobyl Disaster Has Been Greater Than It Seems," 26 Apr. 2018 His death was ultimately attributed to drinking tea poisoned with radionuclide polonium-210. Fox News, "Poisoned Russian ex-spy, daughter have slim chance of surviving, niece says," 28 Mar. 2018 Under the Safe Drinking Water Act, the EPA has set standards and regulations for 90 different contaminants in tap water, including microorganisms, disinfectants, and radionuclides. Beth Mole, Ars Technica, "Meet “raw” water—ludicrously priced unfiltered water with random bacteria," 3 Jan. 2018 This year will mark the half-life of cesium-137, one of the most widespread and dangerous of the radionuclides released. National Geographic, "Animals Rule Chernobyl Three Decades After Nuclear Disaster," 18 Apr. 2016

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

See More

First Known Use of radionuclide

1947, in the meaning defined above

Keep scrolling for more

Learn More about radionuclide

Share radionuclide

Statistics for radionuclide

Look-up Popularity

Time Traveler for radionuclide

The first known use of radionuclide was in 1947

See more words from the same year

Keep scrolling for more

More Definitions for radionuclide


ra·dio·nu·clide | \-ˈn(y)ü-ˌklīd \

Medical Definition of radionuclide 

: a radioactive nuclide

Comments on radionuclide

What made you want to look up radionuclide? Please tell us where you read or heard it (including the quote, if possible).


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!