lunation
noun/luːˈneɪʃən/
Etymology Borrowed from Medieval Latin lūnātiō.
1
A month of an average of approximately 29.53 days, measured from a lunar phase until the return of that same phase.
- And there is not the moon seen in all the lunation, save only the second quarter.1357, John Mandeville, The Travels of Sir John Mandeville, modernized spelling edition:
- The seventh annual Lunar Calendar challenges the traditional structure of the calendar from a feminist perspective. The Lunar Calendar bases its months bases its months on lunations or 28 day lunar cycles, giving us thirteen in a calendar year.1982 December 25, J. Grainger, “Gay-by-Gay Calendars at a Glance”, in Gay Community News, volume 10, number 23, page 9:
2
The irregular period from one new moon until the next.
- Synonyms
- synodic month, lunar month
- Derived terms
- interlunation