Last Updated:2025/11/20
(astronomy, calendar studies) A particular approximate common multiple of the tropical year and the synodic month; in other words, the 19-year period over which the lunar phases occur on the same dates.
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Metonic cycle
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Source Word
Metonic cycle
Noun
Japanese Meaning
太陽年と朔望月の周期がほぼ一致する倍数としての周期、すなわち月の満ち欠けがほぼ同じ日に起こる19年周期の天文現象。
( plural )