半はん月げつ形けい

also: はんげつがた

は

ん

げ

つ

け

い

Meanings

1

noun which may take the genitive case particle 'no'

semicircular; crescent-shaped; half-moon-shaped

Describes something shaped like a half-moon or crescent. Often used as a no-adjective.

半月形
- はんげつけい
  Standard kanji spelling. The reading はんげつけい is more common than はんげつがた.
- はんげつがた
  Alternate reading; less common but still used.
はんげつがた

三み日か月づき形がた
三日月形 specifically refers to a crescent shape like a new moon, while 半月形 is a half-moon shape.
半はん円えん形けい
半円形 means a perfect half-circle, whereas 半月形 can imply a crescent or half-moon shape, not necessarily a geometric half-circle.

Compound of 半月 (half-moon) + 形 (shape).