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fission bomb

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noun
  1. atomic bomb.
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Origin of fission bomb

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fission bomb

fission bomb

noun
  1. a bomb in which the energy is supplied by nuclear fissionSee atomic bomb
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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