θρανίς
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
-ίδος, ἡ, sword-fish, = ξιφίας, Xenocr.17; cf. θρανίας.
German (Pape)
[Seite 1215] ἡ, der Schwertfisch, sonst ξιφίας, Sp. Vgl. θρανίας.
Greek (Liddell-Scott)
θρᾰνίς: -ίδος, ἡ, ἰχθὺς ὁ καλούμενος καὶ ξιφίας, Ξενοκρ. Ἐνυδρ. 8, Πλίν.