• noun
• synonym
• antonym

• plutonium 239 (noun)
  1. a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons
• plutonium bomb (noun)
  1. splitting the nuclei of a heavy element like uranium 235 or plutonium 239 a nuclear weapon in which enormous energy is released by nuclear fission
• plutonium pit (noun)
  1. a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives
• plutonium trigger (noun)
  1. a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives
• weapon-grade plutonium (noun)
  1. plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
• weapons plutonium (noun)
  1. plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
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