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radius vector

radius vector

 
pronunciation:
reI di s vek tr
part of speech: noun
inflections: radii vectores, radius vectors
definition 1: a straight line that joins the origin of a vector, at the intersection of two coordinates, to a given point on the same plane.
definition 2: a vector with a fixed point of origin and movable terminal point, such as a straight line connecting two bodies in relative orbital motion.