mesenteric ganglion

noun

: either of two ganglionic masses of the sympathetic nervous system associated with the corresponding mesenteric plexus:

a

: a variable amount of massed ganglionic tissue of the inferior mesenteric plexus near the origin of the inferior mesenteric artery

called also inferior mesenteric ganglion

b

: a usually discrete ganglionic mass of the superior mesenteric plexus near the origin of the superior mesenteric artery

called also superior mesenteric ganglion