cartridge

noun

1. ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun
2. a light-tight supply chamber holding the film and supplying it for exposure as required
3. a module designed to be inserted into a larger piece of equipment"he loaded a cartridge of fresh tape into the tape deck"
4. an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable