period-luminosity relation

[peer-ee-uh d-loo-muh-nos-i-tee]

noun Astronomy.

the relationship between the period of light variation and of the absolute magnitude of Cepheid variable stars.

Origin of period-luminosity relation

First recorded in 1945–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018