lunation

n. [ Cf. Lunated. ] The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 291/4 to 295/6 days, the average length being 29 d., 12h., 44m., 2.9s. [ 1913 Webster ]

n. [ Cf. Lunated. ] The period of a synodic revolution of the moon, or the time from one new moon to the next; varying in length, at different times, from about 291/4 to 295/6 days, the average length being 29 d., 12h., 44m., 2.9s. [ 1913 Webster ]