lunation

noun

lu·​na·​tion lü-ˈnā-shən 

: the period of time averaging 29 days, 12 hours, 44 minutes, and 2.8 seconds elapsing between two successive new moons

Examples of lunation in a Sentence

Recent Examples on the Web

That same day, the moon will reach its peak of fullness in the warrior-like sign of Aries, marking the first lunation after a supercharged eclipse season. —Valerie Mesa, PEOPLE, 22 Sep. 2025

The caveat to individuating during this lunation is that Neptune retrograde in Aries is close by degree (although not in the same sign) to the Virgo Moon. —Lisa Stardust, Refinery29, 18 Sep. 2025

Let this lunation guide you toward experiences that ignite your spirit! —Meghan Rose, Glamour, 1 Sep. 2025

Embrace the unpredictability surrounding this lunation, and expect the unexpected with themes surrounding your community affairs. —Valerie Mesa, People.com, 5 Aug. 2025

Word History

Etymology

Middle English lunacioun, borrowed from Anglo-French & Latin; Anglo-French lunaison, lunaciun, borrowed from Medieval Latin lūnātiōn-, lūnātiō, from Latin lūna "moon" + -ātiōn-, -ātiō -ation — more at lunar

First Known Use

14th century, in the meaning defined above

Rhymes for lunation

• ablation
• bination
• carnation
• cassation
• castration
• causation
• centration
• cessation
• cetacean
• chelation
• citation
• collation