The term "U-Shaped" refers to a specific geometric form that resembles the letter "U." This shape is characterized by two parallel sides that curve downward and then rise again, creating a valley-like appearance. U-shaped structures can be found in various contexts, such as in design, architecture, and even in graphs representing certain types of data. In economics, a U-shaped curve often illustrates the relationship between two variables, such as cost and output. For example, it can depict how average costs decrease with increased production up to a point, after which they begin to rise again, indicating diminishing returns.