Which term refers to the movement of a body part toward the midline?

The term that refers to the movement of a body part toward the midline is adduction. In anatomical terms, adduction describes the action where a limb or other structure is moved closer to the central axis of the body. This is a fundamental concept in human anatomy and movement, often used to describe the actions of joints.

For instance, when you bring your arms down to your sides from an outstretched position, you are performing adduction. It contrasts with abduction, which refers to moving a body part away from the midline. Therefore, knowing these terms helps in accurately describing body movements and understanding anatomical positions.