Category:Radius vector

Ra"di*us vec"tor.

1. (math.)

Defn: 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 coördinates. See coördinate, N.

2. (astron.)

Defn: 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.