Metonic Cycle Definition
mĭ-tŏnĭk
noun
A period of about 19 years (almost 235 lunar revolutions), in which the phases of the moon repeat on the same dates as in the previous period: used for determining the date of Easter.
Webster's New World
Other Word Forms of Metonic Cycle
Noun
Singular:
Metonic cycle
Plural:
Metonic cyclesOrigin of Metonic Cycle
After Meton (fl. fifth century bc), Athenian astronomer
From American Heritage Dictionary of the English Language, 5th Edition
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