The term "metal unibody" refers to a type of case design for electronic devices, such as smartphones or tablets. It describes an enclosure that is made from a single piece of metal, typically aluminum or stainless steel, which forms the structural frame and exterior surface of the device in one continuous component. This construction method provides several advantages over traditional plastic cases, including increased durability, reduced weight, improved heat dissipation, and enhanced wireless signal reception. The "unibody" design also allows for a more streamlined appearance with fewer seams or joints, providing a sleeker and more refined look compared to other case styles.