You searched for: “interlunation”
interlunation (s) (noun), interlunations (pl)
The period of time between the old and the new moon.
This entry is located in the following units: -ation, -ization (-iz[e] + -ation); -isation (British spelling variation) (page 55) inter-, intero- (page 9) luna-, luni-, lun-, lunu- (page 1)