The correct medical term for the lying down position is supine. When a person is lying on their back with their face and torso facing upward, they are said to be in the supine position. This position is commonly used in medical settings for various procedures and examinations.
Another term related to lying down is prone, which refers to lying face down. Both supine and prone positions are important in medical contexts, as they can affect the outcome of certain treatments and diagnostic tests.