αιθερόπλαγκτος
From LSJ
ὅτι μέντοι καὶ ἡ χρῆσις τῶν τρόπων, ὥσπερ τἆλλα πάντα καλὰ ἐν λόγοις, προαγωγὸν ἀεὶ πρὸς τὸ ἄμετρον, δῆλον ἤδη, κἂν ἐγὼ μὴ λέγω → however, it is also obvious, even without my saying so, that the use of figures of speech, like other literary adornments, is something that has always tempted toward excess
Greek Monolingual
αἰθερόπλαγκτος, -ον (Α)
αυτός που πλανάται στον αιθέρα.
[ΕΤΥΜΟΛΟΓΙΑ < αἰθήρ + πλαγκτός < πλάζω «πλανώ, περιπλανώ»].