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Definitions

fission

[fish-uhn] / ˈfɪʃ ən /


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.

Next, Nasa wants to build nuclear and solar power facilities on the Moon, including fission reactors.

From BBC • May 26, 2026

Existing U.S. nuclear plants, which provide an estimated 18% of the country’s electricity, rely on fission, which splits atoms.

From MarketWatch • May 18, 2026

In one scenario, a rapidly spinning massive star explodes and splits into two smaller neutron stars through a process called fission.

From Science Daily • Apr. 24, 2026

While Binderbauer struggled to fundraise, the success of fission reactor developers Oklo and NuScale Power grabbed the attention of the industry.

From The Wall Street Journal • Mar. 28, 2026

While uranium 235 fissions easily, nuclear fuel is not pure—it is made mostly of uranium 238, which does not fission.

From "Meltdown" by Deirdre Langeland




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