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(def 2).
the splitting of an atomic nucleus into approximately equal parts, either spontaneously or as a result of the impact of a particle usually with an associated release of energy Sometimes shortened to fission Compare nuclear fusion


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  • Nuclear-free

    adjective not having or allowing nuclear weapons or materials, esp. within a specified area; also, not having nuclear power Examples The city declared itself a nuclear-free zone.

  • Nuclear-free zone

    [noo-klee-er-free, nyoo- or, by metathesis, -kyuh-ler-] /ˈnu kli ərˌfri, ˈnyu- or, by metathesis, -kyə lər-/ noun 1. any area in which nuclear weapons, power plants, or materials are not allowed. noun 1. an area barred, esp by local authorities, to the storage or deployment of nuclear weapons An area in which nuclear weapons, by choice […]

  • Nuclear-fuel

    noun 1. Physics. fissile or fertile material that undergoes fission in a nuclear reactor. 2. any light element, as hydrogen or helium, that undergoes fusion and gives off energy within the interior of stars. noun 1. a fuel that provides nuclear energy, used in nuclear power stations, nuclear submarines, etc

  • Nuclear-fusion

    noun 1. (def 4). noun 1. a reaction in which two nuclei combine to form a nucleus with the release of energy Sometimes shortened to fusion Compare nuclear fission See also thermonuclear reaction

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