Ganglion

Part of speech: noun (n.)

1. A mass or knot of nervous matter, including nerve cells, usually forming an enlargement in the course of a nerve.

2. A node, or gland in the lymphatic system; as, a lymphatic ganglion.

3. A globular, hard, indolent tumor, situated somewhere on a tendon, and commonly formed by the effusion of a viscid fluid into it; -- called also weeping sinew. Ganglion cell, a nerve cell. See Illust. under Bipolar.