Abbott-Smith Manual Greek Lexicon
χάλκεος (G5470)
1 (KJV) χάλκεος , -έα, -εον (-οῦς, -ῆ, -οῦν) ( χαλκός ), [in LXX chiefly for נְחֹשֶׁת ;] brazen (i.e. of copper ): Re 9:20 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain