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exoplanet

[ek-soh-plan-it] /ˈɛk soʊˌplæn ɪt/
noun, Astronomy
1.
a planet that revolves around a star other than the sun.
Origin
1970-1975
1970-75; exo- + planet
Related forms
exoplanetary, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for exoplanets

exoplanet

/ˈɛksəʊˌplænɪt/
noun
1.
a planet that orbits a star in a solar system other than that of Earth
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
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exoplanets in Science
exoplanet
  (ěk'sō-plān'ĭt)   
See extrasolar planet.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for exoplanets

exoplanet

any planetary body that orbits a star other than the Sun. The first extrasolar planets were discovered in 1992, and within 15 years some 250 were known.

Learn more about exoplanet with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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