Dictionary

radius vector

noun

Definition of RADIUS VECTOR

1
a :  the line segment or its length from a fixed point to a variable point
b :  the linear polar coordinate of a variable point
2
:  a straight line joining the center of an attracting body (as the sun) with that of a body (as a planet) in orbit around it

First Known Use of RADIUS VECTOR

circa 1753

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April 24, 2015
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