weapon-grade plutonium

Definitions of weapon-grade plutonium
  1. noun
    plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
    synonyms: weapons plutonium
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    type of:
    plutonium 239
    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
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