cartridge

ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun

a light-tight supply chamber holding the film and supplying it for exposure as required

a module designed to be inserted into a larger piece of equipment; "he loaded a cartridge of fresh tape into the tape deck"

an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable