Oh Really

So I was reading Exodus 16 where God supplies Quail and manna to the people of Israel in their 40 year journey to the promised land. I was surpised to find out that manna literally means: "what is it?" It was a very surprising meaning. I always figured it meant bread or something along those lines. Obviously nowadays its connotation is that of food for the most part but it is kind of funny to think about sentences with manna replaced with "What is it?" It's also amusing that a lot of fantasy games use manna as the power for magic or what not. I guess it fits pretty well that some designer needed a mystical power source and used manna for it. Guess they didn't know what powered the magic either!