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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.

"We therefore needed an energy acceptor that selectively captures the multiplied triplet excitons after fission."

From Science Daily • Mar. 28, 2026

Today, all nuclear plants are powered by fission, the process of splitting the atom.

From Barron's • Jan. 23, 2026

In the longer term, Google is looking toward nuclear fusion as opposed to fission: While the latter is used currently in power plants, the former can provide much more energy in a potentially safer process.

From The Wall Street Journal • Oct. 27, 2025

It is produced by nuclear fission for use in medical gauges and devices, but can also be a byproduct of nuclear reactors and weapons testing, the agency said.

From Los Angeles Times • Aug. 19, 2025

And rather than burn it to release energy, they use nuclear fission, a process that unlocks the energy stored inside a tiny, tiny package: the nucleus of an atom.

From "Meltdown" by Deirdre Langeland