What is the medical term for the position of lying face down?

The medical term for the position of lying face down is termed "prone." This position is commonly used in various medical and therapeutic contexts, including examinations, surgeries, and physical therapy, as it can provide specific access to certain parts of the body or facilitate particular treatments.

In contrast, the supine position refers to lying on the back, which is often used for procedures that access the front of the body. The lateral position involves lying on one's side, which can be beneficial for certain types of examinations and procedures as well. Lastly, sitting describes a position where the individual is upright, which is not applicable to the context of lying down. Thus, "prone" is the most accurate term for lying face down.