plutonium trigger

Noun
  1. A steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives (synset 103977031)
    is a type of: trigger - a device that activates or releases or causes something to happen
    is a part of: a-bomb, atom bomb, atomic bomb, fission bomb, plutonium bomb - a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element like uranium 235 or plutonium 239)
    same as: plutonium pit

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