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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

    time was (when)
    at a time in the past when something happened
    Time was when everybody in our town kept their doors unlocked all of the time.



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    If a woman is knocked out, she is pregnant.

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    Invention
    Invention : stove, gas
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    Country : uk.      .. More >>
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