What does the prefix 'sub-' indicate in terms of location?

The prefix 'sub-' originates from Latin, meaning "under" or "below." In medical terminology, this prefix is commonly used to indicate a position or location that is beneath or lower than something else. For instance, in terms such as "subcutaneous," it refers to something that is located beneath the skin. Understanding this prefix is essential as it helps to accurately interpret various medical terms and their implications regarding the location of structures or conditions in the body.