noun, noun which may take the genitive case particle 'no'
column shape; cylinder; columnar
Refers to a shape that is cylindrical or column-like. Often used in technical or descriptive contexts.
この花瓶は円柱形をしている。
This vase has a cylindrical shape.
円柱形の建物が目印です。
The column-shaped building is the landmark.
円筒形 also means 'cylindrical shape' but is more common in everyday use; 円柱形 is slightly more formal or technical.
Compound of 円柱 (column, pillar) + 形 (shape, form).