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radius vector

n.
1.a line connecting a satellite to the center of the body around which it is rotating
2.a line connecting a point in space to the origin of a polar coordinate system

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    Idiom of the Day

    strike a sour note
    to signify something unpleasant
    The statements of the speaker struck a sour note with many members of the audience.



    1.
    The photcopier has packed ________ again so I can't make the copies.

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    Nobel Prize
    Nobel Prize : Chemistry
    Year : 1918
    Name : fritz haber
    Country : germany.      .. More >>
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