cylinder -
n. 1 a a uniform solid or hollow body with straight sides and a circular section. b a thing of this shape, e.g. a container for liquefied gas.
2 a
cylinder-shaped part of various machines, esp. a piston-chamber in
an engine.
3
Printing a metal roller.
cylinder saw = crown saw. cylinder seal Antiq. a small barrel-shaped object of stone or baked clay bearing a cuneiform inscription, esp. for use as a seal.
cylindrical adj. cylindrically adv. [L cylindrus f. Gk kulindros f. kulindo roll]