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Definitions

radioactive

[ray-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.

See Examples For:

These systems produce electrical power from the heat released as plutonium undergoes radioactive decay.

From Science Daily ● Nov. 3, 2026

If this behavior occurs more widely, it could help limit the movement of radioactive contaminants into nearby soil and water.

From Science Daily ● Oct. 23, 2026

Even after 40 years, particles measuring just 8 to 50 micrometers remain highly radioactive, and entering affected areas still requires protective clothing.

From Science Daily ● Oct. 23, 2026

Rather than rapidly releasing radioactive substances, the particles appear capable of retaining fission products within their structures.

From Science Daily ● Oct. 23, 2026

But now they spent their days planning and carrying out the monumental task of cleaning up a radioactive disaster zone.

From "Meltdown" by Deirdre Langeland


Vocabulary lists containing radioactive

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