Strong's Greek #4603
σιδηρᾶν

Englishman's Concordance (References)

σιδηρᾶν sidēran — 1 Occurrence

Acts 12:10 - Adj-AFS
GRK:πύλην τὴν σιδηρᾶν τὴν φέρουσαν
NAS: they came to the iron gate
KJV: unto the iron gate
INT: gate iron that leads