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Definitions

radioactive decay

[rey-dee-oh-ak-tiv di-key] / ˌreɪ di oʊˈæk tɪv dɪˈkeɪ /
NOUN
nuclear reaction
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.

The nonrenewable gas is produced by radioactive decay deep under the earth and escapes into space once released.

From The Wall Street Journal • Mar. 31, 2026

Helium is a byproduct of natural gas extraction, and it also occurs naturally from radioactive decay in the Earth’s crust.

From Seattle Times • Feb. 2, 2024

The breakthrough came when a method, which measures radioactive decay, dated the fossils to 564 million years ago, plus or minus 700,000 years.

From BBC • Jan. 21, 2024

Since 91Sr is unstable, its radioactive decay followed by the release of γ-rays would indicate the emission of particle-stable tetraneutrons.

From Science Daily • Jan. 4, 2024

The weak force engages in more miscellaneous tasks, mostly to do with controlling the rates of certain sorts of radioactive decay.

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




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