noun which may take the genitive case particle 'no'
doughnut-shaped; toroidal
Describes something shaped like a ring or torus, with a hole in the middle. Used in technical and everyday contexts.
この部品はドーナツ状になっている。
This part is doughnut-shaped.
ドーナツ状の雲が空に浮かんでいた。
A doughnut-shaped cloud was floating in the sky.