cartridge

Short definition from Wiktionary

Noun

1. 1
   The package consisting of the bullet, primer, and casing containing gunpowder; a round of ammunition.
2. 2
   A prefabricated subassembly that can be easily installed in or removed from a larger mechanism or replaced with another interchangeable subassembly.
3. 3
   A vessel which contains the ink or toner for a computer printer and can be easily replaced with another.
4. 4
   Magnetic tape storage, used for storing (backup) copies of data.
5. 5
   A removable enclosure containing read-only memory devices, used for rapid loading of software onto a home computer or video game console.
6. 6
   A small paper package, e.g. in an old book about making printer's type: After all the type has been cast: "The Boy will paper up each sort in a cartridge by itself".

Proper noun

1. 1
   A surname.