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Rabbet: noun - rectangular channel cut on the edge, face, of a piece of wood, stone, etc., usually to take the edge or tongue of another piece, beam fixed so it causes the rebounding of a steam hammer. verb – to join or fix using a rabbet or rabbets.
'Dorothy formed the rabbet and its matching tongue so accurately that the joined wooden structure held without the need of glue.'
'You'll need to rabbet that more precisely, Fred, if it's going to stand any chance of making a secure joint.'