From: Allen Dick [mailto:[log in to unmask]]
I therefore wonder if the use of 'rebate' is an unique beekeeping word, a
usage
unique to the former British Empire (somehow not including Canada) or a
common
misspelling.

The saw cut that forms the ledge upon which the frames sit is called a
'rebate' in New Zealand, so that backs Allen's argument re: the Empire...

It is used by people other than beekeepers for the same sort of thing...