προσέψημα
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)
ατος, τό, late form for προσόψ-, Ph.1.542, Dem.Ophth. ap.Aët.7.33, Philum. ap. Orib.45.29.55.
German (Pape)
[Seite 764] τό, = προσόψημα, Schol. Ar. Vesp. 962, zw.; vgl. Lob. Phryn. p. 176.
Greek (Liddell-Scott)
προσέψημα: τό, μετεγεν. τύπος τοῦ προσόψημα, Λοβέκ. εἰς Φρύνιχ. 176.
