From Longman Dictionary of Contemporary Englishhydrogen bombˈhydrogen ˌbomb noun [countable] PMWa very powerful nuclear bomb
Examples from the Corpus
hydrogen bomb• The heat released in this reaction, which is like a controlled hydrogen bomb explosion, is what makes the star shine.• The main source of helium-3 is in fact hydrogen bomb recycling!• On 12 July 1953, when the Soviet Union exploded its first hydrogen bomb, equilibrium was restored.• Might it not be the equivalent of a small hydrogen bomb?• The large scale release of fusion energy has so far occurred only in stars and in the hydrogen bomb.• Truman ordered the development of the hydrogen bomb accelerated. 