A curved structure is a type of structure that is curved in shape. An example of this type of structure is an ARCH, which is a curved structure that is often used in architecture and engineering. The term 'ARCH' is derived from the Latin word 'arcus, ' which means bow or ARCH. An ARCH is typically constructed from stone, brick, or concrete and is used to support the weight of a structure above it. Arches are often used in bridges, doorways, and other architectural features.