ἀπόρρυμα

Ἓν οἶδα, ὅτι οὐδὲν οἶδα → I know only one thing, that I know nothing | all I know is that I know nothing.

Diogenes Laertius, Lives of the Philosophers, Book 2 sec. 32.

Greek (Liddell-Scott)

ἀπόρρῠμα: -ατος, τό, = ἀπορροὴ, Ἐπιφάν. τ. 1. σ. 269. ΙΙ. μέτρον Αἰγυπτιακὸν διὰ ὑγρά, ὁ αὐτ. 2. 182D.