noun, noun which may take the genitive case particle 'no'
ring-shaped; annular; loop-shaped
Describes something that forms a ring or loop, often used in technical, geographical, or anatomical contexts (e.g., 環状道路, 環状線).
東京には環状道路がいくつかある。
There are several ring roads in Tokyo.
This molecule has a ring structure.
This road forms a loop.
We arranged the chairs in a ring.
loop line; belt line
stone circle