radioisotope

noun

ra·​dio·​iso·​tope ˌrā-dē-ō-ˈī-sə-ˌtōp 

: a radioactive isotope

radioisotopic

ˌrā-dē-ō-ˌī-sə-ˈtä-pik 

-ˈtō-

adjective

radioisotopically

ˌrā-dē-ō-ˌī-sə-ˈtä-pi-k(ə-)lē 

adverb

Examples of radioisotope in a Sentence

Recent Examples on the Web

Voyager 2 and its twin launched in 1977, called Voyager 1, rely on a form of nuclear battery known as a radioisotope thermoelectric generator that uses the heat produced by the decay of plutonium. — Elizabeth Howell, Space.com, 7 Aug. 2026

Both Voyager probes run on radioisotope thermoelectric generators, or devices that convert the heat provided by decaying plutonium into electricity. — Ashley Strickland, CNN Money, 6 Aug. 2026

Those pulses create the extreme conditions needed to compress fusion fuel, while also supporting high-energy-density physics experiments used in materials research, radioisotope production and national security. — Neetika Walter, Interesting Engineering, 16 July 2026

In 1965, Manion began practicing with the band in one of the chemistry labs or the radioisotope laboratory in Lewis Science Center. — Arkansas Online, 11 July 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1938, in the meaning defined above

Rhymes for radioisotope

• antelope
• bronchoscope
• cantaloupe
• cystoscope
• endoscope
• envelope
• epitope
• gyroscope
• horoscope
• isotope
• microscope
• misanthrope

Kids 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

radioisotopic

-ˌī-sə-ˈtäp-ik, -ˈtōp-ik 

adjective

radioisotopically

-i-k(ə-)lē 

adverb