h bomb

/ˈeɪtʃ bɑm/
noun
  1. A very powerful type of nuclear bomb that uses the fusion of hydrogen atoms; also called a hydrogen bomb.
    • The country tested its first h-bomb in a remote desert area.
    • Many scientists warned about the devastating effects of an h-bomb.
    • The h-bomb is far more destructive than the atomic bombs used in World War II.
Synonyms
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