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
4.
an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable