Which term describes moving a limb in closer to the body's midline?

The term that describes moving a limb closer to the body's midline is adduction. This movement involves bringing a body part inward, reducing the angle between that part and the midline of the body. For instance, when you lower your arms from an outstretched position back to your sides, you are performing adduction.

Understanding adduction is crucial in various contexts, such as physical rehabilitation, exercise science, and anatomy. It helps to differentiate it from related movements; for example, abduction refers to moving a limb away from the midline, while flexion generally pertains to decreasing the angle between body parts, such as bending a joint. Supination involves a specific rotational movement, primarily of the forearm or foot, and does not pertain to the midline movement. These distinctions are important for accurately describing physical movements in healthcare and fitness settings.