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Cepheus

[see-fee-uh s, -fyoos] /ˈsi fi əs, -fyus/
noun, genitive Cephei
[see-fee-ahy] /ˈsi fiˌaɪ/ (Show IPA),
for 1.
1.
Astronomy. a northern circumpolar constellation between Cassiopeia and Draco.
2.
Also, Kepheus. Classical Mythology. an Ethiopian king, the husband of Cassiopeia and father of Andromeda.
Related forms
Cepheid
[see-fee-id] /ˈsi fi ɪd/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for cepheid

Cepheus1

/ˈsiːfjuːs/
noun (Latin genitive) Cephei (ˈsiːfɪˌaɪ)
1.
a faint constellation in the N hemisphere near Cassiopeia and the Pole Star See also Cepheid variable
Word Origin
from Latin Cēpheus named after the mythical king

Cepheus2

/ˈsiːfjuːs/
noun
1.
(Greek myth) a king of Ethiopia, father of Andromeda and husband of Cassiopeia
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 cepheid

Cepheid

n.

type of variable star, 1904, from Delta Cephi, the name of the first such star identified, which is in the dim northern constellation Cephus, named for Greek Kepheus, a mythical king. With -id.

Online Etymology Dictionary, © 2010 Douglas Harper
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cepheid in Science
Cepheid
  (sē'fē-ĭd, sěf'ē-)   
Any of a class of variable stars whose luminosity fluctuates with an extremely regular period. There is a strong correlation between the absolute magnitude of a Cepheid's luminosity and its period. By comparing the apparent magnitude of a Cepheid to the absolute magnitude corresponding to its period, it is possible to determine fairly accurately how distant the Cepheid is from Earth. Also called Cepheid variable.
Cepheus
  (sē'fys', -fē-əs)   
A constellation in the Northern Hemisphere near Cassiopeia and Draco.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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