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Cepheid variable

American

Or cepheid variable

noun

Astronomy.

a variable star in which changes in brightness are due to alternate contractions and expansions in volume.

Cepheid variable British

/ ˈsiːfɪɪd /

noun

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Cepheid variable

First recorded in 1900–05; Cephe(us) + -id ¹

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023