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)