GANGLION

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

2. ganglion ·noun a mass or knot of nervous matter, including nerve cells, usually forming an enlargement in the course of a nerve.

3. ganglion ·noun 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.