: a process in which the nucleus of a heavy atom is split apart
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Nationwide study Rather than relying on the combustion of fossil fuels, nuclear reactors harness the energy released through nuclear fission to generate heat.—Mrigakshi Dixit, Interesting Engineering, 23 Feb. 2026 When enriched uranium undergoes nuclear fission, efficiencies are much higher.—Big Think, 16 Feb. 2026 Most fusion technologies, as well as nuclear fission, are based on generating heat to power steam turbines, which produce the electricity.—Jordan Blum, Fortune, 13 Feb. 2026 In nuclear fission, Uranium-235 is the critical fuel that sustains the reaction.—Julian Hayes Ii, Forbes.com, 21 Jan. 2026 See All Example Sentences for nuclear fission