Meaning of radius vector
Pronunciation: (vek-tôr'ēz, -tōr'-), [key]
— pl. radii vec•to•res radius vectors.
- the length of the line segment joining a fixed point or origin to a given point.
- the straight line joining two bodies in relative orbital motion, as the line from the sun to a planet at any point in its orbit.
- the distance between two such bodies at any point in the orbit.