νεροσέλινον
From LSJ
ὅτι χρὴ τοῦ μέλιτος ἄκρῳ δακτύλῳ, ἀλλὰ μὴ κοίλῃ χειρὶ γεύεσθαι → that honey should be tasted with the fingertip and not by the handful
Greek (Liddell-Scott)
νεροσέλινον: τό, ὡς καὶ νῦν, τὸ ἐν ὕδασι φυόμενον ἀγριοσέλινον, Δουκάγγ.