When body parts are described as being on opposite sides, they are referred to as:

Body parts that are located on opposite sides of the body are referred to as contralateral. This term specifically describes structures or conditions that are situated on different sides. For example, if one leg is injured, the other uninjured leg is considered contralateral.

The other terms describe different relationships in anatomy: ipsilateral refers to structures on the same side of the body, proximal indicates a position closer to a point of reference (such as the trunk of the body), and distal refers to a position further from that reference point. Understanding these terms is essential for accurately describing anatomical relationships and any related medical conditions.