nuclear reaction

noun

physics
: a process in which the nucleus of an atom is changed by being split apart or joined with the nucleus of another atom

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This refers to the point at which a nuclear reaction can sustain itself. Chris Young, Interesting Engineering, 16 Feb. 2026 This stops the nuclear reaction, acting as the first line of defense. Jethu Abraham, Wired News, 2 Apr. 2026 Uranium, the fuel used to make a nuclear reaction, is dominated by just four countries, including Russia. Tasmin Lockwood, CNBC, 6 Dec. 2025 Gas flowing from the expanding red giant gradually accumulates on the white dwarf until conditions become extreme enough to ignite a runaway nuclear reaction. Jamie Carter, Forbes.com, 25 June 2026 See All Example Sentences for nuclear reaction

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“Nuclear reaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nuclear%20reaction. Accessed 8 Jul. 2026.

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