δολιχόπους
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)
ὁ, ἡ, πουν, τό, A = δολιχήπους.
German (Pape)
[Seite 654] ουν, ποδος, = δολιχήπους?.
Greek (Liddell-Scott)
δολῐχόπους: ὁ, ἡ, -πουν, τό, = δολιχήπους.