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Definitions

radioactivity

[rey-dee-oh-ak-tiv-i-tee] / ˌreɪ di oʊ ækˈtɪv ɪ ti /


NOUN
radiation
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.

It also has bet on aneutronic fuels, which are seen as cleaner but require higher temperatures, while competitors have relied on neutronic fuels associated with more radioactivity but lower temperatures.

From MarketWatch • May 18, 2026

At-211's short half-life also means it quickly loses its radioactivity, making it less toxic than longer-lived radiopharmaceuticals.

From Science Daily • Nov. 11, 2025

“And there’s been a lot of reasons for why this process takes so long. But, from a radiological perspective, the actual residual radioactivity at the site is pretty modest.”

From Los Angeles Times • Nov. 7, 2025

The Burevestnik’s radioactivity could make it easy to detect.

From The Wall Street Journal • Oct. 28, 2025

The heart of a nuclear reactor seethes with deadly radioactivity.

From "Meltdown" by Deirdre Langeland




Vocabulary lists containing radioactivity


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