mesenteric plexus

noun

: either of two plexuses of the sympathetic nervous system lying mostly in the mesentery in close proximity to and distributed to the same structures as the corresponding mesenteric arteries:

a

: one associated with the inferior mesenteric artery

called also inferior mesenteric plexus

b

: a subdivision of the celiac plexus that is associated with the superior mesenteric artery

called also superior mesenteric plexus