nuclear fission

[ noo-klee-er fish-uhn ]
/ ˈnu kli ər ˈfɪʃ ən /

noun

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Origin of nuclear fission

First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for nuclear fission

nuclear fission

noun

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 energySometimes shortened to: fission Compare nuclear fusion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012