: a process in which the nucleus of a heavy atom is split apart
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In such a scenario, nuclear fission offers a carbon-free source of electricity, and companies are expected to make a beeline for this ‘cleaner’ power in the future.—Ameya Paleja, Interesting Engineering, 7 May 2026 Fusion machines do not rely on the same process as traditional nuclear fission reactors and have different fuel cycles, waste streams, and safety characteristics, officials said.—Stephen Underwood, Hartford Courant, 3 May 2026 First, it is generated at a power plant using coal, natural gas, nuclear fission, or renewables.—Big Think, 22 Apr. 2026 There's also the issue that nuclear fission is a highly toxic process.—Keith Cooper, Space.com, 27 Mar. 2026 See All Example Sentences for nuclear fission