ξιφίας
From LSJ
τὸ κακὸν δοκεῖν ποτ' ἐσθλὸν τῷδ' ἔμμεν' ὅτῳ φρένας θεὸς ἄγει πρὸς ἄταν → evil appears as good to him whose mind the god is leading to destruction (Sophocles, Antigone 622f.)
English (LSJ)
ου, ὁ, (ξίφος)
A sword fish, Arist.HA505a18, Fr.325,Archestr. Fr.40; cf. σκιφίας. II a kind of comet (from the shape), Plin.HN 2.89.
German (Pape)
[Seite 280] ὁ, alles Schwertförmige; – a) der Schwertfisch, Archestrat. bei Ath. VII, 314 e; Pol. 34, 2, 15. – b) nach Plin. 2, 25, 23 eine Art der Kometen.