συσχολαστής
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
οῦ, ὁ,
A school-fellow, fellow-student, Phld.Acad.Ind. p.91 M., D.H.Rh.9.12, Plu.2.47e, BCH32.430 (Delos); σ. τινός Zeno ap.D.L.7.9; τινὸς παρά τινι Str.13.1.67.--The word is noted as not Att. by Phryn.378 and prob. by Thom.Mag.p.337 R. (where codd. have σχολαστάς).
