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*Χάλυψ, seul. pl. Χάλυϐες.
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LSJ
υβος, ὁ, in pl., the Chalybes in Pontus, who were famous for the preparation of steel, οἱ σιδηροτέκτονες Χάλυβες A. Pr. 715, cf. Hdt. 1.28, X. An. 5.55.1, Call. in PSI 9.1092.48 (on another nation of the same name v. Str. 12.3.20). as Appellat., χάλυψ, hardened iron, steel, A. Pr. 133 (lyr.), S. Tr. 1260 (anap.), Antip.Sid. in POxy. 662.52; of a penknife, AP 6.65 (Paul. Sil.); of an axe, APl. 4.127; as Adj., Nonn. D. 36.182; — also Χάλυβος, ον, Χάλυβος Σκυθῶν ἄποικος, i.e.
steel, A. Th. 728 (lyr.); Χαλύβῳ πελέκει E. Fr. 472.6 (anap.); pl., = Χάλυβες, E. ap. Sch. Il. Oxy. 1087 i 28; τὸν ἐν Χαλύβοις σίδαρον Id. Alc. 980 (lyr.).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)