|lieriö englanniksi||cylinder fi|
: When the two-dimensional curve is a circle, the cylinder is called a circular cylinder. When the axis is perpendicular to the plane of the curve, the cylinder is called a right cylinder. In non-mathematical usage, both right and circular are usually implied.
*: A big greyish rounded bulk, the size, perhaps, of a bear, was rising slowly and painfully out of the cylinder.