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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.

But then, he predicted that industries would start using uranium and radium, and pretty soon we’d have … radioactive smog.

From Los Angeles Times • Mar. 26, 2026

The license specifically applies to Atomic Alchemy, a wholly-owned subsidiary dealing in the production of radioactive isotopes.

From Barron's • Mar. 18, 2026

The U.S. military has elite teams specially trained to remove radioactive material from a conflict zone.

From The Wall Street Journal • Mar. 15, 2026

Herrera was certainly the less radioactive candidate of the two.

From Slate • Mar. 9, 2026

The government has yet to find a place to permanently store the soil it has scraped from the towns of Fukushima and until they do, the radioactive waste will continue to be a hazard.

From "Meltdown" by Deirdre Langeland