period-luminosity relation

[ peer-ee-uhd-loo-muh-nos-i-tee ]

/ ˈpɪər i ədˌlu məˈnɒs ɪ ti /

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noun Astronomy.

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

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Origin of period-luminosity relation

First recorded in 1945–50

Unlike the Soviet Union at a certain period in history, the Russian economy does not hold a candle to that of the United States.
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The detectives are still at it, seeking to account for a period of time when Brinsley may well have paused to sit somewhere.
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The idea that January 1st initiates a period of new beginning is not a flash of Hallmark brilliance.
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The FCC investigation recently closed its comment period on the Marriott case.
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Kim Kardashian Breaks the InternetTalking about butts in relation to Kim Kardashian had become tired.
Year of the Butt: How the Booty Changed the World in 2014|Kevin Fallon|December 30, 2014|DAILY BEAST
This mania for correction shows itself too in relation to the authorities themselves.
Children's Ways|James Sully
The reformers of the earlier period were not indifferent to the need for centralized organization in the banking system.
Readings in Money and Banking|Chester Arthur Phillips
Tobacco at this period was also rolled up in the leaves of the Palm and smoked.
Tobacco; Its History, Varieties, Culture, Manufacture and Commerce|E. R. Billings.
The relation existing between the balmy plant and the commerce of the world is of the strongest kind.
Tobacco; Its History, Varieties, Culture, Manufacture and Commerce|E. R. Billings.
In the close relation and affection of these last days, the sense of alienation and antagonism faded from both their hearts.
Ramona|Helen Hunt Jackson