Lunar (adjective)

1. Relating to the moon or its movements.
2. Of or relating to the period of 29.5 days in which the moon completes one full cycle of phases.

Origin:

Late 17th century: from latin lunar "relating to the moon", from luna "moon".

Examples:

1. The lunar calendar is based on the cycles of the moon.
2. The lunar module was used to land on the moon.
3. The lunar eclipse occurs when the earth is between the sun and the moon.
4. The lunar year has 12 lunar months.
5. The lunar surface is covered with a layer of fine dust called regolith.