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atomic weight

n.
1.(chemistry) the ratio of the atomic mass of an element to half the atomic mass of carbon-12

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    Idiom of the Day

    jam on the brakes
    to quickly put the brakes on to stop a car or truck etc.
    I jammed on the brakes to avoid hitting the child.



    1.
    To remove the seeds from an apple one needs to cut out the ________.

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