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Cepheid variable

noun, Astronomy
1.
a variable star in which changes in brightness are due to alternate contractions and expansions in volume.
Also, cepheid variable.
Origin
1900-1905
1900-05; Cephe(us) + -id1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for Cepheid variable

Cepheid variable

/ˈsiːfɪɪd/
noun
1.
(astronomy) any of a class of variable stars with regular cycles of variations in luminosity (most ranging from three to fifty days). There is a relationship between the periods of variation and the absolute magnitudes, which is used for measuring the distance of such stars
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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