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[see-fee-uh s, -fyoos] /ˈsi fi əs, -fyus/
noun, genitive Cephei
[see-fee-ahy] /ˈsi fiˌaɪ/ (Show IPA),
for 1.
Astronomy. a northern circumpolar constellation between Cassiopeia and Draco.
Also, Kepheus. Classical Mythology. an Ethiopian king, the husband of Cassiopeia and father of Andromeda.
Related forms
[see-fee-id] /ˈsi fi ɪd/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for cepheid
Historical Examples
  • We will install it in the 'S Doradus' and the 'cepheid' as a weapon.

    The Ultimate Weapon John Wood Campbell
  • Some stars pulsed, like the cepheid variables, but in an orderly way.

    The Egyptian Cat Mystery Harold Leland Goodwin
  • And then for an instant, the cepheid's bright wink was dulled; eclipsed.

  • Shapley has estimated the distances of many of these bodies, which contain a large number of variable stars of the cepheid type.

    Astronomy David Todd
  • The "cepheid," her sister ship, had gone along on seven of the trips, and added to the total.

    The Ultimate Weapon John Wood Campbell
  • They started down the corridor, and came presently to the huge locks where the "S Doradus" and the "cepheid" were berthed.

    The Ultimate Weapon John Wood Campbell
British Dictionary definitions for cepheid


noun (Latin genitive) Cephei (ˈsiːfɪˌaɪ)
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


(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



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
  (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.
  (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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