The term 'Mortise and TENON' is a type of woodworking joint used to join two pieces of wood together. It consists of a mortise, which is a hole cut into one piece of wood, and a TENON, which is a projection on the other piece of wood that fits into the mortise. The joint is secured by pegs, wedges, or glue. This type of joint has been used for centuries and is still used today in furniture making and carpentry.