Final answer:
An Economy brick is the term for a modular brick with dimensions of 4 x 4 x 8 inches, being larger than the standard brick to reduce construction costs.
Step-by-step explanation:
The term used to describe a modular brick with nominal dimensions of 4 x 4 x 8 inches (102 x 102 x 203mm) is an Economy brick. This type of brick is designed larger than a standard one, which generally measures 3 5/8 x 2 1/4 x 8 inches for a modular brick. The larger size of the economy brick allows for a reduction in both labor and material costs because fewer bricks are needed to cover a given area. It's essential for those in construction and design to be aware of different brick sizes and types to ensure the correct application for structural integrity and aesthetic purposes.