θερίστρια
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)
ἡ, fem. of θεριστήρ, Ar.Fr.788.
German (Pape)
[Seite 1201] ἡ, fem. zu θεριστήρ, Ar. bei Poll. 7, 150.