waning moon
noun
Meaning
- A moon (usually the Moon, that is, Earth's moon) when it appears smaller each night as it progresses from a full moon to a new moon: a moon in any of the diminishing lunar phases.
Etymology / origin
From waning + moon. Compare Middle English waynynge of the mone, wanynge of þe mone (literally “waning of the moon”).
Sources
No citations have been attached yet.