Thorens 125 MkII: MM or MC cartridge? What's diff?

I purchased a used Thorens 125 MkII. I'm pretty sure the cartridge is a Shure V15VMR. I'm pretty inexperienced with turntables, so I'd like to know whether the cartridge is MM or MC, since the Denon 3802 A/V reciever I'll probably buy will only accept MM. Since I'm so inexperienced, I don't know the difference between MM and MC, let alone what they stand for. Also, is the Thorens only compatable with one of these cartridges, regardless of whether it's a Shure?
Thanks,
Steve