κνήμαργος
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)
ον,
A white-legged, Theoc.25.127.
German (Pape)
[Seite 1460] heißt bei Theocr. 25, 127 wahrscheinlich »weißfüßig«; Hesych. erkl. παχύκνημος.
Greek (Liddell-Scott)
κνήμαργος: -ον, ἔχων λευκὰς κνήμας, Θεόκρ. 25. 127. ― Καθ᾿ Ἡσύχ.: «κνήμαργος· κνημώδης, παχύκνημος».