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Callisto

[kuh-lis-toh] /kəˈlɪs toʊ/
noun
1.
Also, Kallisto. Classical Mythology. a nymph attendant on Artemis, punished for a love affair with Zeus by being changed into a bear and then transformed into stars as the constellation Ursa Major.
2.
Astronomy. a large natural satellite of the planet Jupiter.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Callisto

Callisto1

/kəˈlɪstəʊ/
noun
1.
(Greek myth) a nymph who attracted the love of Zeus and was changed into a bear by Hera. Zeus then set her in the sky as the constellation Ursa Major

Callisto2

/kəˈlɪstəʊ/
noun
1.
the second largest (but faintest) of the four Galilean satellites of Jupiter, discovered in 1610 by Galileo. Approximate diameter: 4800 km; orbital radius: 1 883 000 km See also Galilean satellite
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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Word Origin and History for Callisto
Callisto
2nd moon of Jupiter, in classical mythology a nymph, mother of Arcas by Zeus, turned to a bear by Hera, from Gk. kallistos, superl. of kalos "beautiful." Feminized as proper name Callista.
Online Etymology Dictionary, © 2010 Douglas Harper
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Callisto in Science
Callisto
  (kə-lĭs'tō)   
One of the four brightest satellites of Jupiter and the eighth in distance from the planet. Originally sighted by Galileo, it is the largest planetary satellite.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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