Dictionary entry

σιδήρεος

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

σιδήρεος, -α, -ον (-οῦς, -ᾶ -οῦν)

(< σίδηρος), [in LXX chiefly for בַּרְזֶל;]

of iron: Ac 12:10, Re 2:279:912:519:15.†