ὀκτώπους
From LSJ
αὐτὸν κέκρουκας τὸν βατῆρα τοῦ λόγου → you have struck the very threshold of the argument, you have struck the most important and chiefmost point
English (LSJ)
ουν,
A = ὀκτάπους, as Subst., = σκορπίος, -πουν ἀνεγείρεις Cratin.77 : acc. pl. [ὀκ]τώπους (dub. sens.) prob. in PCair.Zen.510 (iii B. C.). II eight feet long, IG12.313.90 ; of eight square feet, χωρίον Pl.Men.82e, 83a.
German (Pape)
[Seite 318] = ὀκτάπους; τὸ ὀκτώπουν χωρίον, Plat. Men. 82 e; ὀκτώπουν ἀνεγείρεις, Cratin. bei Phot. u. Suid., für σκορπίος.