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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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Word of the Day

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    Idiom of the Day

    ocean(s) of (something)
    a very large amount of something
    There was oceans of food at the party. There was an ocean of people at the festival.



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    recant

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