Dictionary entry

χάλκεος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

χάλκεος, -έα, -εον (-οῦς, -ῆ, -οῦν)

(< χαλκός), [in LXX chiefly for נְחֹשֶׁת;]

brazen (i.e. of copper): Re 9:20.†