plutonium trigger

/pluˌtoʊniəm ˌtrɪgər/
IPA guide

Definitions of plutonium trigger
  1. noun
    a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives
    synonyms: plutonium pit
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    type of:
    trigger
    a device that activates or releases or causes something to happen
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