noun
also synodical month
: the average period of recurrence of the phases of the moon (as from new moon to new moon) equal to 29 days, 12 hours, 44 minutes, and 2.8 seconds of mean solar time — called also lunar month
noun
also synodical month
: the average period of recurrence of the phases of the moon (as from new moon to new moon) equal to 29 days, 12 hours, 44 minutes, and 2.8 seconds of mean solar time — called also lunar month
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012