ἀριθμητής
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 calculator, Pl.Just.373b.
German (Pape)
[Seite 351] ὁ, der Rechner, Plat. de iust. 373 d.