# radius vector

Mathematics. the length of the line segment joining a fixed point or origin to a given point.

Astronomy.

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.

## Origin of radius vector

^{1}

## Words Nearby radius vector

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use radius vector in a sentence

The line drawn from the sun to any point of the orbit (the string from pin to pencil point) is a

*radius vector*.A Text-Book of Astronomy | George C. ComstockThe

*radius vector*of each planet moves over equal areas in equal times.A Text-Book of Astronomy | George C. ComstockThe

*radius vector*(or line joining sun and planet) sweeps out equal areas in equal times.Pioneers of Science | Oliver LodgeAiry wrote expressing his interest, and asked for particulars about the

*radius vector*.History of Astronomy | George ForbesThis circumstance occurs, among other occasions, in the case of a

*radius vector*in geometry, and diverging forces in mechanics.The philosophy of mathematics | Auguste Comte

## British Dictionary definitions for radius vector

maths a line joining a point in space to the origin of polar or spherical coordinates

astronomy an imaginary line joining a satellite to the planet or star around which it is orbiting

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for radius vector

A line segment that joins the origin and a variable point in a system of polar or spherical coordinates.

The imaginary straight line that connects the center of the Sun or another body with the center of a planet, comet, or other body that orbits it.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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