Which term is used to refer to the side of the body?

The term that refers to the side of the body is "later/o." In medical terminology, "latero-" derives from the Latin word "lateralis," which means "side." It is commonly used in various terms to indicate a position or direction relative to the midline of the body. For instance, "lateral" describes structures that are farther away from the midline, while "medial" refers to structures closer to the midline. This directional terminology is essential for understanding anatomy and communication in the medical field.

The other terms relate to different anatomical concepts. "Medi/o" refers to the middle or medial side, which is the opposite of lateral. "Poster/o" denotes the back or posterior aspect of the body, while "organ/o" pertains to organs, not positions in relation to the body's midline. Thus, "later/o" distinctly captures the concept of the side, making it the correct choice.