Moving a part away from the midline of the body or the axial line of a limb is called .

The movement described in your question is termed abduction. In anatomical terms, abduction refers to the action of moving a limb or part away from the midline of the body or, in the case of a limb, away from the axial line, which is a line that runs through the center of the limb.

This is an essential concept in anatomy and kinesiology as it pertains to understanding how muscles function while moving the body. Abduction is the opposite of adduction, which is the movement of bringing a limb or part back toward the midline or axial line of the limb.

For example, when you raise your arms to the side, you are performing abduction of the shoulders. Similarly, when you spread your fingers apart, that movement is also termed abduction of the fingers. Understanding these terms is crucial in fields such as physical therapy, sports science, and anatomy education, as they help in describing movements accurately.