mandible

This term is primarily used in anatomical and biological contexts to describe the structural bone or appendage of the jaw. In humans and other vertebrates, it refers specifically to the lower jaw, distinguishing it from the maxilla, which is the upper jaw.

In entomology, the term describes the specialized mouthparts of arthropods. These structures are often adapted for specific ecological roles, such as crushing, slicing, or carrying, and are distinct from the internal skeletal structures found in mammals.