synodic month編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看synodic monthsynodic month — 名詞名詞1. the time it takes for the moon to return to the same phase1.名詞釋義朔望月the time it takes for the moon to return to the same phase例句A synodic month is about 29.5 days long.