μηλοφύλαξ
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
English (LSJ)
[ῠ], ᾰκος, ὁ, ἡ,
A one who watches sheep, APl.4.233; or apples, Sch. E.Hipp.742.
German (Pape)
[Seite 173] ακος, ὁ, Schaafwächter, -hirt, Theaet. Schol. 3 (Plan. 233). – Apfelwächter, Schol. Eur. Hipp. 742.
Greek (Liddell-Scott)
μηλοφύλαξ: [ῠ], -ακος, ὁ καὶ ἡ, ὁ φυλάττων πρόβατα, Ἀνθ. Πλαν. 233· ἢ μῆλα, Σχόλ. εἰς Εὐρ. Ἱππ. 742.