Final answer:
A brick laid horizontally on the longer edge with the shorter end exposed is known as a Rowlock Brick. It is commonly used in construction to create decorative arches or to form part of a window or door frame.
Step-by-step explanation:
A brick laid horizontally on the longer edge with the shorter end exposed is known as a Rowlock Brick. It gets its name from the rowlock arch, which is formed by a row of bricks laid horizontally with their ends exposed. This type of brick is commonly used in construction to create decorative arches or to form part of a window or door frame.