[1] : The Collaborative International Dictionary of English v.0.48

radius vector \ra"dius vec"tor\ ve^k"to^r.
   1. math. a straight line or the length of such line
      connecting any point, as of a curve, with a fixed point,
      or pole, round which the straight line turns, and to which
      it serves to refer the successive points of a curve, in a
      system of polar coordinates. see coordinate, n.
      1913 webster

   2. astron. an ideal straight line joining the center of an
      attracting body with that of a body describing an orbit
      around it, as a line joining the sun and a planet or
      comet, or a planet and its satellite.
      1913 webster
see also:
coordinate 

[2] : WordNet (r) 2.0

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

Radius >> R Words
Radius, definition of term: Radius
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Vector >> V Words
Vector, definition of term: Vector
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Vector Product >> V Words
Vector Product, definition of term: Vector Product
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Vector Graphics >> V Words
Vector Graphics, definition of term: Vector Graphics
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