Definition of germon in US English:

germon

noun

rare
  • A tuna; especially the albacore, Thunnus alalunga.

Origin

Late 17th century. From French germon, of uncertain origin. Perhaps related to Anglo-Norman gernon tench, or perhaps related to French (regional) germon, gernon shoot of a plant, although if so the semantic connection is unclear.

Pronunciation

germon

/ˈdʒəːmən/