The supine position (n or n) is a position of the body: lying with the face up, as opposed to the prone position, which is face down, sometimes with the hands behind the head or neck. When used in surgical procedures, it allows access to the peritoneal, thoracic and pericardial regions; as well as the head, neck and extremities. Using anatomical t...
The posture of an individual lying face up. ... (12 Dec 1998) ... 
one in which the patient is lying on the back. Called also dorsal position.
Type: Term Definitions: 1. lying on the back. Synonyms: dorsal position