cylinder

noun
1
a solid or hollow figure with round ends and long straight sides
استوانه, سیلندر
2
an object like a cylinder in shape, especially one used as a container
استوانه, سیلندر
a gas/oxygen cylinder
All our aircraft carry at least one oxygen cylinder for emergency use on board.
3
the hollow tube in an engine, like a cylinder in shape, inside which the piston moves
سیلندر
a six-cylinder engine