"Morris Dovey" wrote in message
Similar to mortise and tenon - except that I think of a mortise as a
(doubly) stopped dado, and this isn't stopped at either end.

Do A and B have different names, or do they share the same name?

B is called a "barefaced housing joint".

Citation: "Good Wood Joints";Jackson and Day; Harper Collins 1995

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Last update: 2/20/07