From Longman Dictionary of Contemporary EnglishH-bombH-bomb /ˈeɪtʃ bɒm $ -bɑːm/ noun [countable] informal PMWhydrogen bomb
Examples from the Corpus
H-bomb• It is burning hydrogen into helium, like a controlled H-bomb.• The number of countries that have H-bombs is limited because the technology for making tritium is so hard to come by.• What do you think about the H-bomb?• Teller, of course, worked on the atom bomb and the H-bomb.• I know the H-bomb is wrong.• The sheer destructiveness of the H-bomb could force the rival power blocs to negotiate and seek ways to avoid general war.Origin H-bomb (1900-2000) hydrogen bomb 