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Showing results for radioactivity.
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.

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

The Burevestnik’s radioactivity could make it easy to detect.

From The Wall Street Journal • Oct. 28, 2025

For every following year, there is a little less radioactivity in newly formed cells, which means that they can be 'dated'.

From Science Daily • Nov. 21, 2024

Alvarez seconded Nahmias’s perception that the cyclotron was used “as a radioactivity factory first of all because great numbers of new radioisotopes could be discovered that way with very little effort.”

From "Big Science" by Michael Hiltzik




Vocabulary lists containing radioactivity