What Is the End Piece of Bread Called?

We've all heard the saying, "the greatest thing since sliced bread." While it may be a phrase, we've heard spoken more times than we ever needed to hear, there's a reason it's become commonplace. Sliced bread is incredible. Sandwiches, subs, toast—you name it, you can make it. Whether it's some fresh ciabatta, banana bread or gluten-free pumpkin bread, it's all delicious. Even just a basic loaf of bread can make a bad day better. That's a fact!
But we've got some questions. You know, like, what is the end piece of bread called? It's time we settled the debate.
Even within the English-speaking world, everyone's got their own dialect. My Chicago vernacular isn't the same as a New Orleans vernacular, but that's what makes us all so interesting.
But back to the main point. The end piece of bread. It keeps all our bread slices neatly together. We've seen it, we know it, we've probably flipped past it a few (or many) times in our lives. But what's it called? The proper term is in fact "heel," according to the Cambridge Dictionary.
What Is the End Piece of Bread Called?