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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

“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

"Three hours before the scan, we inject patients with a tiny amount of radioactivity," explained consultant radiologist, Dr Randeep Kulshrestha.

From BBC • Feb. 26, 2025

In March, Enrico Fermi demonstrated that neutrons were the most effective inducers of radioactivity in elements heavier than phosphorus.

From "Big Science" by Michael Hiltzik




Vocabulary lists containing radioactivity