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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.

In this study, researchers successfully recreated a key step in the process by observing proton capture on radioactive arsenic-73 for the first time.

From Science Daily • Apr. 14, 2026

Neighbouring Arab Gulf states have frequently expressed concerns about the plant's reliability and raised the risk of radioactive leaks in the event of a major earthquake.

From Barron's • Apr. 4, 2026

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

From The Wall Street Journal • Mar. 15, 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



Vocabulary lists containing radioactive