χρυσόρρυτος
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 gold-streaming, A.Pr.805; νάματα Supp.Epigr.4.467.2 (Didyma, iii A. D.); cf. χρυσόρυτος.
Greek (Liddell-Scott)
χρῡσόρρυτος: -ον, ὁ χρυσᾶ ῥεύματα ἔχων, Αἰσχύλ. Πρ. 805· πρβλ. χρυσόρυτος.