Cylinder (noun)

A solid or hollow geometric figure with two parallel bases circular in shape, whose surface is generated by straight lines connecting the circumference of the bases.

Origin:

Late 16th century: via latin from greek kulindros "rolling pin, cylinder", from kulindein "to roll".

Examples:

1. The gas cylinder was filled with propane for the barbecue.
2. The engine of the car had six cylinders.
3. The cylinder of a revolver holds the ammunition.
4. The hydraulic cylinder was used to lift heavy objects.
5. The cylinder lock was difficult to pick.