# radius vector

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## radius vector

*n.*

**1.**

*Mathematics*

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

**b.**The length of such a line segment.

**2.**

*Astronomy*A straight line connecting the center of mass of a satellite, such as a planet, moon, or comet, to the center of mass of the body it orbits, such as the sun or Earth. Also called

*position vector*.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

## radius vector

*n*

**1.**(Mathematics)

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

**2.**(Astronomy)

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

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## ra′dius vec′tor

*n.*

*pl.*

**radii vec•to•res**(vɛkˈtɔr iz, -ˈtoʊr-)

**radius vectors.**

**1.**

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

**2.**

*Astron.*

**a.**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.

**b.**the distance between two such bodies at any point in the orbit.

[1745–55]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

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Noun | 1. | radius vector - a line connecting a satellite to the center of the body around which it is rotatingvector - a variable quantity that can be resolved into components |

2. | radius vector - a line connecting a point in space to the origin of a polar coordinate systemvector - a variable quantity that can be resolved into components |

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

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