Which term defines the Roman structure used for carrying water over long distances?

The term that defines the Roman structure used for carrying water over long distances is "aqueduct." Aqueducts are impressive engineering feats that utilized a series of channels, bridges, and pipes to transport fresh water from rural areas into cities and towns. The design allowed for gravity to drive the flow of water, often through varied terrain—ascending and descending in elevation as necessary.

This architecture was crucial to the prosperity of Roman cities, providing vital water for drinking, bathing, and irrigation. The use of arches in their construction helped to support the weight of the structure over valleys or uneven ground, making them both durable and efficient. While "arch," "bridge," and "road" pertain to significant architectural and infrastructural elements, they do not specifically refer to the system designed for water transport, making "aqueduct" the precise term needed for this purpose.