Consider the term Hurssel used - 'bracket'... why did he select this term, how is it different than the other words that he could have used - what

Consider the term Hurssel used - 'bracket'... why did he select this term, how is it different than the other words that he could have used - what makes it important in this case? For example, if you were the one that came up with this theory - what other terms might you have considered and then rejected? What would be the cause for rejection such that 'bracket' was the better term?