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Definition of H-bomb noun from the Oxford Advanced Learner's Dictionary

H-bomb

noun
 
/ˈeɪtʃ bɒm/
 
/ˈeɪtʃ bɑːm/
(also hydrogen bomb)
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  1. a very powerful nuclear bombTopics War and conflictc2
    Word Origin1950s: from H (denoting hydrogen) + bomb.
See H-bomb in the Oxford Advanced American Dictionary

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