Definition of radius vector
English to English noun - a line connecting a satellite to the center of the body around which it is rotating
source: WordNet 3.0 - a line connecting a point in space to the origin of a polar coordinate system
source: WordNet 3.0 - 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.
source: Webster 1913
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