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lunar cycle

[ loo-ner sahy-kuhl ]
/ ˈlu nər ˈsaɪ kəl /
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noun Astronomy.

a cycle of 235 synodic months, very nearly equal to 19 years, after which the new moon occurs on the same day of the year as at the beginning of the cycle with perhaps a shift of one day, depending on the number of leap years in the cycle.

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Also called Metonic cycle .

Origin of lunar cycle

First recorded in 1695–1705
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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