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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.

See Examples For:

Over that period, the detector recorded around 100 antineutrino candidate events linked to residual radioactivity in the reactor cores and nearby spent-fuel cooling pools.

From Science Daily Aug. 14, 2026

But the presence of heavily armed soldiers, security checkpoints, and signs warning of radioactivity are anything but ordinary.

From Barron's Jun. 28, 2026

There, Erikson teased out the stealthy, almost sinister peculiarities of modern man-made hazards, like radioactivity and toxicity, and their special, traumatic effects.

From The Wall Street Journal Dec. 18, 2025

The camera will then pick up the radioactivity in such a way that doctors can see how, for example, a cancer has spread.

From BBC Feb. 26, 2025

Thanks to radioactivity the Earth could be–and self-evidently was–much older than the twenty-four million years Kelvin’s calculations allowed.

From "A Short History of Nearly Everything" by Bill Bryson




Vocabulary lists containing radioactivity


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