lu·nar 
(lnər)
(lnər)adj.
1. Of, involving, caused by, or affecting the moon.
2. Measured by the revolution of the moon.
3. Of or relating to silver.
[Middle English, crescent-shaped, from Old French lunaire, from Latin lūnāris, of the moon, from lūna, moon; see leuk- in the Appendix of Indo-European roots.]