nuclear fission

[ noo-klee-er fish-uhn ]
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Origin of nuclear fission

1
First recorded in 1885–90

pronunciation note For nuclear fission

See nuclear.

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British Dictionary definitions for nuclear fission

nuclear fission

noun
  1. 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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