lunar monthlunar month
The average time between successive new or full moons, equal to 29 days, 12 hours, 44 minutes. Also called synodic month.
(plural lunar months)
- a period from one new moon until the next.
- a synodic month of approximately 29.53 days, measured from a lunar phase until the return of that same phase.
- a sidereal month of approximately 27.32 days, the length of time taken by the moon in its orbit about the Earth to return to the same point as viewed against the background of stars.