n. (Carp.) A flaring tenon, or tongue (shaped like a bird's tail spread), and a mortise, or socket, into which it fits tightly, making an interlocking joint between two pieces which resists pulling a part in all directions except one. [ 1913 Webster ]
Dovetail molding (Arch.),
Dovetail saw (Carp.),
v. t.
He put together a piece of joinery so crossly indented and whimsically dovetailed . . . that it was indeed a very curious show. Burke. [ 1913 Webster ]