also: びげつ
noun
Literary or poetic term for a crescent moon, often compared to an eyebrow (眉). The common word is 三日月.
See also: 三日月
夕空に細い眉月が浮かんでいた。
A thin crescent moon hung in the evening sky.
三日月 is the standard, everyday word for a crescent moon. 眉月 is a more literary or poetic synonym.
From 眉 (まゆ, eyebrow) + 月 (つき, moon), referring to the eyebrow-like shape of a crescent moon. The reading びげつ is the on-reading.