nouns
ammunition consisting of a cylindrical casing containing an explosive charge and a bullet; fired from a rifle or handgun
is a type of (narrower)
projectiles to be fired from a gun
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"
is a type of (narrower)
a self-contained component (unit or item) that is used in combination with other components
an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable