Final answer:
The body position or direction for moving away from the midline, pertaining to a side, is called lateral.
Step-by-step explanation:
The body position or direction for moving away from the midline, pertaining to a side, is called lateral. Lateral refers to movement towards the side of the body. For example, when you move your arm outwards away from your body, it is a lateral movement. The other options, medial, proximal, and distal, are not correct for this scenario.