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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

    dress (someone) down or dress down (someone)
    to scold someone
    The supervisor took the clerk into her office to dress her down.



    1.
    Choose an idiom to replace the expression in the brackets:
    The football player was (finished) several years ago and should have quit then.

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    Invention
    Invention : aerosol can
    Year : 1926
    Inventor : erik rotheim
    Country : norway.      .. More >>
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