Which term describes the motion "away from the midline of the body"?

The term that describes the motion "away from the midline of the body" is abduction. In biomechanics, abduction refers to the movement of a limb or structure away from the centerline of the body or from another part. For example, when you raise your arms sideways away from your torso or spread your fingers apart, you are performing abduction.

This term is commonly used in the context of joints such as the shoulder and hip joints, where limbs can move in such a manner. Understanding this concept is essential in various fields, including anatomy, kinesiology, and physical therapy, as it helps in the assessment of movements and the design of rehabilitation programs.