• synonyms


noun, genitive Cas·si·o·pe·iae [kas-ee-uh-pee-ee] /ˌkæs i əˈpi i/ for 1.
  1. Astronomy. a northern constellation between Cepheus and Perseus.
  2. Classical Mythology. the wife of Cepheus and mother of Andromeda.
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Related formsCas·si·o·pe·ian, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for cassiopeia

Historical Examples

  • Except that I like their names, Aldebaran and Cassiopeia, and so on.

    Fantasia of the Unconscious

    D. H. Lawrence

  • This is not, like Ursa Major, or like Cassiopeia, said to be "circumpolar."

    The Story of the Heavens

    Robert Stawell Ball

  • The correct name of this constellation is Cassiopeia's Chair.

  • And the way to find this arc is to draw a curve from Capella to Cassiopeia.

  • “I am glad to hear that you are going to give the ukelele to Cassiopeia,” said Uncle Henry.

    The Star People

    Gaylord Johnson

British Dictionary definitions for cassiopeia


  1. Greek myth the wife of Cepheus and mother of Andromeda
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noun Latin genitive Cassiopeiae (ˌkæsɪəˈpiːiː)
  1. a very conspicuous W-shaped constellation near the Pole Star. Cassiopeia A is a very strong radio and X-ray source, identified as the remnant of a supernova thought to have occurred in the late 17th century
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Derived FormsCassiopeian, adjective
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

Word Origin and History for cassiopeia



northern constellation, in Greek mythology queen of Ethiopia and mother of Andromeda, from Latinized form of Greek Kassiepeia, Kassiopeia, of unknown etymology. Related: Cassiopeian.

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Online Etymology Dictionary, © 2010 Douglas Harper

cassiopeia in Science


  1. A W-shaped constellation in the Northern Hemisphere near Andromeda and Cepheus.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.