a three-dimensional shape or surface traced by a straight line moving in a circle parallel to a fixed straight line and passing through all the points of a circle in other closed curves
the space bounded by a cylinder and two parallel planes that cross it
a hollow or solid object with the shape of a cylinder and a circular or oval cross-section
the piston chamber in a steam or internal-combustion engine
any of various rotating parts, e.g. in printing presses
a metal container for gas under pressure
[early French cylindre via Latinfrom Greek kylindros roller, from kylindein to roll]