円柱状、columnar, cylindrical

円柱状

columnar: shaped like a column

cylindrical: shaped like a cylinder

column: "A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member. The term column applies especially to a large round support (the shaftof the column) with a capital and a base or pedestal^[1] which is made of stone, or appearing to be so. " (Column, Wikipedia)；欄、コラム

円柱, cylinder：「数学において円柱（えんちゅう、英: cylinder）とは二次曲面（三次元空間内の曲面）の一種で、デカルト座標によって次の方程式で定義されるものである：”　円柱、Wikipedia

A cylinder (from Greek κύλινδρος – kulindros, "roller", "tumbler"^[1]) has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes. It is the idealized version of a solid physical tin can having lids on top and bottom.(Cylinder, Wikipedia)