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plutonium trigger

n.
1.a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives

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  • Idiom of the Day

    meet up with (someone or something)
    to meet someone or something by accident or without expecting to
    The young man met up with a nice group of people while he was traveling in Australia.



    1.
    None of my friends (a) / are applying (b) / for this job. (c) / No error (d)

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