#atom_bomb__atomic_bomb__A-bomb__fission_bomb__fissionbomb__plutonium_bomb__plutoniumbomb  a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element (uranium 235 or plutonium 239))
  supertype:  #nuclear_weapon__nuclearweapon  a weapon of mass destruction whose explosive power derives from a nuclear reaction
  subtype:  #neutron_bomb__neutronbomb  atom bomb that produces lethal neutrons with less blast

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