The prefix "sub-" typically indicates what position in relation to another structure?

The prefix "sub-" is derived from Latin, meaning "under" or "below." It is commonly used in medical terminology to describe a position that is beneath or lower than another structure. For instance, "subcutaneous" refers to the layer of tissue beneath the skin, and "subdural" refers to a space located beneath the dura mater in the brain. This prefix clearly conveys the idea of being positioned underneath or below something else, which is essential for accurately describing anatomical locations and relationships in the body. Understanding this prefix helps in interpreting various medical terms that utilize it, ensuring clarity in communication within the medical field.