two edged ax; battle ax
Latin word, found 43 times in the texts on Socratos.
Vergil, Georgics 4.331: ure sata et validam in vites molire bipennem,
Vergil, Aeneid 2.479: Ipse inter primos correpta dura bipenni
Ovid, Metamorphoses 5.79: At non Actoriden Erytum, cui lata bipennis
All forms of bipennis