Aside from the Latin, the most common term for lying on your back is supine.
The medical term for a patient lying on his belly is the prone position. The opposite of the prone position is supine, or the patient lying flat on his back.
Orthopnea is the medical term meaning shortness of breath when lying flat.
Supine is the medical term meaning lying down facing up.
lateral decubitus
Anterior means on the front side. Someone lying on their back is supine.
Pronation is the act of lying prone, or face-down.Prone positionProstration is the act of assuming a prostrate position, a position where one is lying face down.Pronation is the act of rotating the hands and forearms so that the palms face downward.
Prone means lying horizontal with the face down. Pronation is the action of lying prone.
Dorsal is the medical term meaning back.
semi supine or prone
Resting, recumbent, lying back, reclining... Hope this helps!
Orthopnea is the medical term meaning a person breathes more easily when sitting or standing than when lying down. It is a typical finding in pneumonia.
Dorsum is a medical term meaning back. For example the dorsum of the hand is commonly known as the back of the hand.