Dictionary

Cepheid

noun Ce·phe·id \ˈse-f(ē-)id, ˈsē-\

Definition of CEPHEID

:  any of a class of variable stars whose very regular light variations are related directly to their intrinsic luminosities and whose apparent luminosities are used to estimate distances in astronomy
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Origin of CEPHEID

International Scientific Vocabulary, from Cepheus
First Known Use: circa 1903

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