/'kɑ:trɪdʒ; `kɑrtrɪdʒ/
n
1 (US shell) tube or case containing explosive (for blasting), or explosive with a bullet or shot (for firing from a gun) 子弹; 弹药筒; 弹壳. =>illus at gun 见gun之插图. Cf 参看 shell 3, shot1 4.
2 detachable end of a pick-up on a record player, holding the stylus （唱机的）唱头; （拾音器的）心座.
3 sealed case containing recording tape, photographic film or ink, that is put into a tape-deck, camera or pen 录音带盒; 胶卷盒; 钢笔囊.

n[C]
[Date: 1600-1700; Origin: cartage 'cartridge' (16-17 centuries), from French cartouche 'gun cartridge with a paper case', from Italian cartoccio, from carta; CARD¹]
a small container or piece of equipment that you put inside something to make it work
　computer game cartridges
　an ink cartridge for a printer
a tube containing explosive powder and a bullet that you put in a gun
= shell