Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
h-bomb is a noun meaning "a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium". It carries one recorded sense.
a nuclear weapon that releases atomic energy by union of light (hydrogen) nuclei at high temperatures to form helium
Definitions, synonyms and semantic relations for h-bomb come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.