The term 'Dovetailing Piece' refers to a type of woodworking joint that is created by cutting a TENON, which is a projection on the end of a piece of wood, into the end of another piece of wood. The two pieces are then joined together by inserting the TENON into a mortise, which is a recess in the other piece of wood. This joint is very strong and is used to join two pieces of wood together in a way that is both aesthetically pleasing and structurally sound.