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Showing results for radioactive. Search instead for radio-isotope.
Definitions

radioactive

[rey-dee-oh-ak-tiv] / ˌreɪ di oʊˈæk tɪv /
ADJECTIVE
active
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

I admit that Emerald Fennell’s adaptation of Emily Brontë’s classic novel is a radioactive choice for a best-of list.

From Salon • Jun. 10, 2026

The fuel will be highly radioactive for "tens of thousands of years", he said.

From Barron's • Jun. 1, 2026

Scientists have found that using a radioactive implant precisely where a tumor was removed in the brain can help patients get their cancer treated more quickly and in many cases, live longer.

From The Wall Street Journal • May 30, 2026

“The dangers are so much different. Instead of an explosion, it just turns off. There’s no radioactive waste. So this light touch is exactly what the Congress overwhelmingly … wanted the NRC to do.”

From MarketWatch • May 18, 2026

Closer to the reactor buildings, a thousand water storage tanks holding more than 250,000 gallons of radioactive water crowded the grounds.

From "Meltdown" by Deirdre Langeland



Vocabulary lists containing radioactive


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