noun which may take the genitive case particle 'no', noun
cylindrical; cylinder-shaped
Describes something having the shape of a cylinder; often used in technical or descriptive contexts.
この容器は円筒形をしている。
This container is cylindrical.
円筒形の建物が目印です。
The cylindrical building is the landmark.
筒状 also means 'cylindrical' or 'tube-shaped', but is more commonly used in compound descriptions (e.g., 筒状の花). 円筒形 is slightly more formal and precise.
Compound of 円筒 (cylinder) + 形 (shape). The word is a straightforward Sino-Japanese formation.