/ ˈkɑːtrɪdʒ; NAmE ˈkɑːrt-/ noun
1.
( NAmE also shell ) a tube or case containing explosive and a bullet or shot , for shooting from a gun
2.
a case containing sth that is used in a machine, for example film for a camera, ink for a printer, etc. Cartridges are put into the machine and can be removed and replaced when they are finished or empty.
3.
a thin tube containing ink which you put inside a pen
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WORD ORIGIN
late 16th cent.: from French cartouche (feminine noun), from Italian cartoccio , from carta , from Latin carta , charta , from Greek khartēs papyrus leaf.