In anatomical terminology, which term describes the body's midline?

The term that describes the body's midline is "medial." In anatomical terminology, "medial" refers to structures that are closer to the midline of the body. The midline is an imaginary line that divides the body into equal left and right halves. For example, the nose is medial to the ears, as it is located closer to this midline.

On the other hand, "lateral" refers to structures that are farther away from the midline, such as the ears being lateral to the nose. "Distal" and "proximal" are terms used to describe positions relative to the trunk of the body or the point of attachment of a limb. Distal means farther from the point of origin, while proximal means closer. Therefore, "medial" accurately describes the relation to the midline of the body.