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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

It could release vast amounts of energy with little associated radioactivity.

From BBC Dec. 18, 2025

Mutations also occur because of radioactivity or ultraviolet light from the Sun or cosmic rays or chemicals in the environment, all of which can change the nucleotides or tie the nucleic acids up in knots.

From "Cosmos" by Carl Sagan




Vocabulary lists containing radioactivity


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