(n) the full time that elapses between successive brand-new moons, averaging 29 times, 12 hours, 44 mins; a lunar month.
(n) a month of approximately 29.53 days, measured from a lunar stage before return of the exact same stage. Normally, the amount of times between Comprehensive Moons is approximately 29.5306 days. The range days may vary from normal number by over a half day. From Full Moon to another, how many days in a single lunation can differ between 29.272 and 29.833 days.
(n) The irregular duration from one new moon before the after that.
Lunation in Astronomy Dictionary
the interval of an entire lunar cycle, between one brand new Moon together with after that. A lunation is equal to 29 times, 12 hours, and 44 moments. by Clemmie CabanaReport definition