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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.

Conventional nuclear plants split heavy atoms in a process called fission.

From The Wall Street Journal • Mar. 28, 2026

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

From Science Daily • Mar. 28, 2026

Today, all of the world’s nuclear energy is generated from fission, the process of splitting the nucleus of an atom.

From Barron's • Dec. 18, 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

Seaborg’s next step was to test the new element’s fission cross section— in other words, to determine whether it could sustain a chain reaction and make a bomb.

From "Big Science" by Michael Hiltzik