Ganglion

[gang-glee-uh n] /ˈgæŋ gli ən/

noun, plural ganglia
[gang-glee-uh] /ˈgæŋ gli ə/ (Show IPA), ganglions.
1.
Anatomy.

2.
Pathology. a cyst or enlargement in connection with the sheath of a tendon, usually at the wrist.
3.
a center of intellectual or industrial force, activity, etc.
/ˈɡæŋɡlɪən/
noun (pl) -glia (-ɡlɪə), -glions
1.
an encapsulated collection of nerve-cell bodies, usually located outside the brain and spinal cord
2.
any concentration of energy, activity, or strength
3.
a cystic tumour on a tendon sheath or joint capsule
n.

1680s, from Greek ganglion “tumor,” used by Galen for “nerve bundle.” Of unknown origin; according to Galen, the proper sense of the word was “anything gathered into a ball.”

ganglion gan·gli·on (gāng’glē-ən)
n. pl. gan·gli·ons or gan·gli·a (-glē-ə)

gan’gli·al adj.
ganglion
(gāng’glē-ən)
Plural ganglia
A compact group of neurons enclosed by connective tissue and having a specific function. In invertebrate animals, pairs of ganglia occur at intervals along the axis of the body, with the forwardmost pair functioning like a brain. In vertebrates, ganglia are usually located outside the brain or spinal cord, where they regulate the functioning of the body’s organs and glands as part of the autonomic nervous system.