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fusion bomb

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noun
  1. hydrogen bomb.
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Origin of fusion bomb

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for fusion bomb

fusion bomb

noun
  1. a type of bomb in which most of the energy is provided by nuclear fusion, esp the fusion of hydrogen isotopesAlso called: thermonuclear bomb, fission-fusion bomb See also hydrogen 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