This glossary of basketball terms is a list of definitions of terms used in the game of basketball. Like any other major sport, basketball features its own extensive vocabulary of unique words and phrases used by players, coaches, sports journalists, commentators, and fans.
The point is that every missed shot has to have a rebound. And to be able to balance the box score, there needs to be a rebound for every miss. That way you know the box score adds up. It's kind of like a geometry proof, where the left side has to equal the right side.