δέργμα
From LSJ
ἐπεὰν νῶτον ὑὸς δελεάσῃ περὶ ἄγκιστρον, μετιεῖ ἐς μέσον τὸν ποταμόν, ὁ κροκόδειλος ἵεται κατὰ τὴν φωνήν, ἐντυχὼν δὲ τῷ νώτῳ καταπίνει → when he has baited a hog's back onto a hook, he throws it into the middle of the river, ... the crocodile lunges toward the voice of a squealing piglet, and having come upon the hogback, swallows it
English (LSJ)
ατος, τό, (δέρκομαι)
A look, glance, κυανοῦν λεύσσων δέργμα δράκοντος looking the look of... A.Pers.82, cf. E.Med.187, ect. II thing seen, sight, Orph.L.339.
German (Pape)
[Seite 548] τό, der Blick, Anblick, Aesch. Pers. 82; Eur. Hec. 1251 u. öfter.