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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.

That process releases huge amounts of energy, no carbon emissions and limited radioactivity.

From The Wall Street Journal • Dec. 18, 2025

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

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

As well as radioactivity, chemical exposure could also be a problem for anyone nearby.

From BBC • Jun. 19, 2025

Caltech hinted to Poillon that Lawrence’s claims for primacy in the discovery of induced radioactivity slighted results obtained first, or at least virtually concurrently, by Lauritsen.

From "Big Science" by Michael Hiltzik