The term ELBOW'S LOCALE is referring to the ARM, which is three letters long. The elbow is a joint in the ARM that connects the upper ARM and the forearm. It is the point at which the two bones of the ARM meet and is a major joint in the body. The elbow is responsible for bending and straightening the ARM, as well as rotating the forearm. It is also used to support the weight of the body when standing or sitting.