celiac plexus
nounMedical Definition of celiac plexus
: a nerve plexus that is situated in the abdomen behind the stomach and in front of the aorta and the crura of the diaphragm, surrounds the celiac artery and the root of the superior mesenteric artery, contains several ganglia of which the most important are the celiac ganglia, and distributes nerve fibers to all the abdominal viscera
— called also solar plexus