Okay, so have you ever heard of someone who loves to eat only certain kinds of food? Like they only want pizza every day or they only want tacos? Well, an artotyrite is kind of like that, but with something called Eucharist bread.
See, in some religious ceremonies, they use special bread as a symbol of something important. But some people will only eat that special bread, and they won't eat any other kind of bread. That's what an artotyrite is - someone who only wants that special Eucharist bread and won't eat any other kind of bread.
So it's kind of like if you really, really loved pizza and only ever wanted to eat pizza, even if there were other kinds of food around. But instead of pizza, it's this special bread that's important to some people's religious beliefs.