Examples of radioisotope in a Sentence
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Past missions have used radioisotope thermoelectric generators (RTGs) to power deep-space probes where solar light is faint.
—
Aman Tripathi, Interesting Engineering, 14 Jan. 2026
Cesium-137, or Cs-137, is a manmade radioisotope of cesium.
—Sara Tenenbaum, CBS News, 22 Dec. 2025
The primary life-limiting factor for the rover is its radioisotope thermoelectric generator, which generates electricity from the heat released by the radioactive decay of plutonium-238 and gradually produces less power over time.
—Sharmila Kuthunur, Space.com, 19 Dec. 2025
Voyager 1 is slowly losing power The spacecraft is powered by three radioisotope thermoelectric generators.
—George Petras, USA Today, 25 Nov. 2025
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Aman Tripathi, Interesting Engineering, 14 Jan. 2026
Cesium-137, or Cs-137, is a manmade radioisotope of cesium.
—Sara Tenenbaum, CBS News, 22 Dec. 2025
The primary life-limiting factor for the rover is its radioisotope thermoelectric generator, which generates electricity from the heat released by the radioactive decay of plutonium-238 and gradually produces less power over time.
—Sharmila Kuthunur, Space.com, 19 Dec. 2025
Voyager 1 is slowly losing power The spacecraft is powered by three radioisotope thermoelectric generators.
—George Petras, USA Today, 25 Nov. 2025
See All Example Sentences for radioisotope
Cite this Entry
“Radioisotope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radioisotope. Accessed 28 Jan. 2026.
Copy CitationKids Definition
radioisotope
noun
ra·dio·iso·tope
ˌrād-ē-ō-ˈī-sə-ˌtōp 
: a radioactive isotope
Medical Definition
radioisotope
noun
ra·dio·iso·tope
ˌrād-ē-ō-ˈī-sə-ˌtōp
: a radioactive isotope compare radioelement
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