radioisotope

1 of 2

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

radioisotopic

2 of 2

adjective

ra·​dio·​iso·​to·​pic ¦rā-dē-ō-ˌī-sə-¦tä-pik 

-¦tō-

: of, relating to, using, or being a radioisotope

radioisotopic techniques

radioisotopically

¦rā-dē-ō-ˌī-sə-¦tä-pi-k(ə-)lē 

-¦tō-

adverb

Examples of radioisotope in a Sentence

Recent Examples on the Web

Noun

Oklo also promises to produce special radioisotopes for medical and industrial end users. —Ian Dexter Palmer, Forbes.com, 4 May 2026

Voyager 1 and its twin, Voyager 2, are powered by radioisotope thermoelectric generators that convert heat from decaying plutonium into electricity. —Eric MacK, FOXNews.com, 21 Apr. 2026

The spacecraft runs on a radioisotope thermoelectric generator — a device that converts heat from decaying plutonium into electricity. —Willem Marx, NPR, 19 Apr. 2026

Avalanche will test the battery’s operational resilience using particle accelerators and active radioisotopes. —Ameya Paleja, Interesting Engineering, 9 Apr. 2026

Word History

Etymology

Noun

International Scientific Vocabulary

First Known Use

Noun

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