What is the inside of a nut called? My 3-year-old and I were sharing our traditional mix of Christmas nuts. He's getting pretty good at cracking them open by himself, and wanted to know what the part he eats is called. Anyone have an authoritative answer?
I've always heard the "meat" of the nut, or "nutmeat". Alternate terms include "kernel" or "seed" or, well, "nut". 

If you were to ask a botanist, the edible part is the embryo and the endosperm, though it varies depending on which type of seed you're referring to. Also, for a few seeds—not sure if any of them are called nuts—we eat the seed coat as well (e.g., beans).