Which term describes a position that pertains to the side of the body?

The term that describes a position pertaining to the side of the body is "lateral." In medical terminology, "lateral" refers to structures that are further away from the midline of the body, indicating a position that is toward the sides. For instance, if you were to describe the arms in relation to the torso, the arms are lateral to the midline, whereas the torso is medial.

In contrast, the term "medial" indicates proximity to the midline, describing structures that are closer to the center of the body. The terms "proximal" and "distal" are used to describe the relative distance from the trunk of the body or the point of attachment. "Proximal" means closer to the point of attachment, while "distal" means further away from it. Thus, "lateral" is the most accurate term for describing a position toward the side of the body.