The term 'ELL' can refer to several different things. An ARM is a joint connecting the upper ARM to the shoulder, and is three letters long. An EXTENSION is an addition to a building, and is nine letters long. A WING is a part of a building that extends from the main structure, and is four letters long. An ANNEX is an additional building connected to a main structure, and is five letters long. An ELBOW is a joint connecting the forearm to the upper ARM, and is also five letters long. Finally, HOMESTRETCH is a term used to describe the final part of a race or competition, and is eleven letters long.