γαγγλίον
From LSJ
English (LSJ)
τό,
A encysted tumour on a tendon or aponeurosis, Philagr. ap.Aët.15.9 (Ἀθηνᾶ 21.29), Heras ap.Gal.13.815, etc.; also on the head, Paul.Aeg.6.39; the nerve-knots now called ganglia are compared to such a tumour, Gal.UP16.5.