Dovetail joints are typically found in drawer construction. They're a sign of pieces well constructed with solid wood versus chipboard.
The edges of this counter are connected with attractive dovetails.
Very similar to a dovetail joint is a box joint, differing only in that the projections and recesses are square and not fanned.
The corners of this contemporary home have enormous pins and tails, which are the alternating projections of a dovetail joint.