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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

The global nuclear watchdog has so far said the levels of radioactivity outside two sites which were attacked and damaged on Friday are unchanged.

From BBC • Jun. 18, 2025

Cabrera Services also said it’s “unlikely” the radioactivity is from large deposits of alum mud.

From Los Angeles Times • Dec. 2, 2024

For a long time it was assumed that anything so miraculously energetic as radioactivity must be beneficial.

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