also: はんげつがた
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.
半月形のテーブルを買った。
I bought a semicircular table.
その島は半月形をしている。
The island is crescent-shaped.