συσχολαστής
From LSJ
Ὁ κόσμος σκηνή, ὁ βίος πάροδος· ἦλθες, εἶδες, ἀπῆλθες → The world is a stage, life is your entrance: you came, you saw, you departed (Democritus fr. 115 D-K)
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).
German (Pape)
[Seite 1046] ὁ, der mit Muße hat, bes. der Mitschüler, Strab. u. Plut.; s. Lob. Phryn. 401.