noun, genitive Cas·si·o·pe·iae [kas-ee-uh-pee-ee] /ˌkæs i əˈpi i/ for 1.

Astronomy. a northern constellation between Cepheus and Perseus.
Classical Mythology. the wife of Cepheus and mother of Andromeda.

Related formsCas·si·o·pe·ian, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for cassiopeia




Greek myth the wife of Cepheus and mother of Andromeda



noun Latin genitive Cassiopeiae (ˌkæsɪəˈpiːiː)

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
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.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for cassiopeia



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