δρυΐνας
From LSJ
αὐτῇ καθ' αὑτὴν εἰλικρινεῖ τῇ διανοίᾳ χρώμενος → by using his mind alone by itself and uncorrupted
English (LSJ)
ου, ὁ,
A serpent living in hollow oaks, Nic.Th.411, Dsc. Ther.11.
German (Pape)
[Seite 668] ὁ, eine in hohlen Eichen sich aufhaltende Schlangenart, Nic. Th. 471.