The term 'Bracket Shelf' refers to a type of shelf that is supported by brackets. The brackets are usually attached to the wall and the shelf is placed on top of them. The term can also refer to a type of lighting fixture, known as a SCONCE, which is mounted on the wall and has a shelf attached to it. The term 'ELL' is an abbreviation for 'ELBOW, ' which is a type of bracket used to support the shelf. The term 'ELLS' is an abbreviation for 'ELBOWS, ' which is the plural form of 'ELBOW.' Finally, the term 'SCONCE' is an abbreviation for 'SCONCE, ' which is a type of lighting fixture that is mounted on the wall and has a shelf attached to it.