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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.

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That radioactive spider that transformed Peter Parker into Spider-Man could have bitten the class moron just as easily.

From Salon Aug. 16, 2026

Any comic book fan knows that Spider-Man's secret identity is Peter Parker, a science nerd who gained superhero powers after being bitten by a radioactive spider.

From BBC Jul. 31, 2026

Separating and purifying the elements from mineral deposits often requires toxic chemicals, while radioactive substances are frequently present in the same geological formations.

From Science Daily Jul. 24, 2026

The Environmental Protection Agency website notes that “multiple government agencies” approved the deep-ocean disposal of some refinery and chemical waste and military and radioactive junk, but it doesn’t specify DDT.

From Los Angeles Times Jul. 15, 2026

Steam that passes through the torus is scrubbed of most of its radioactive isotopes before it leaves the building, a vast improvement over allowing the steam to enter the environment without any intervention.

From "Meltdown" by Deirdre Langeland



Vocabulary lists containing radioactive


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