a solid geometrical figure with straight parallel sides and a circular or oval section 圆柱体 ■a solid or hollow body, object, or part with such a shape 圆柱形物 ■a piston chamber in a steam or internal-combustion engine 汽缸 ■a cylindrical container for liquefied gas under pressure 气瓶 ■a rotating metal roller in a printing press 印刷机滚筒 ■(Archaeology)a cylinder seal (考古)筒形石印