"made of iron, Acts 12:10; Rev. 2:27; 9:9; 12:5; 19:15*"
Definition and meaning
made of iron, Acts 12:10; Rev. 2:27; 9:9; 12:5; 19:15*
In the original Greek the word is written: σιδηροῦς
Historical context
The Roman Empire provided infrastructure no previous civilization had built — roads, sea routes, a common language in Greek, and relative peace across the Mediterranean. Jewish synagogues existed in every major city, giving Paul a starting point everywhere he traveled. The early church had no buildings, no political power, no social standing — and spread faster than any movement in ancient history.
The people who first heard this word were not reading a book — they were living through empires, oppression, exile, and covenant. Every word carried the weight of that reality. Understanding it changes how you read Scripture.
Scripture references
These are the most notable occurrences of siderous (G4603) across the King James Bible.
When they were past the first and the second ward, they came unto the iron gate that leadeth unto the city; which opened to them of his own accord: and they went out, and passed on through one street; and forthwith the angel departed from him.
And he shall rule them with a rod of iron; as the vessels of a potter shall they be broken to shivers: even as I received of my Father.
And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle.
And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne.
And out of his mouth goeth a sharp sword, that with it he should smite the nations: and he shall rule them with a rod of iron: and he treadeth the winepress of the fierceness and wrath of Almighty God.
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Common questions
Strong's G4603 (siderous) is a Greek word that means: made of iron, Acts 12:10; Rev. 2:27; 9:9; 12:5; 19:15* It appears 5 times in the King James Bible.
The word siderous (G4603) appears 5 times in the original Greek text.
Strong's G4603 is siderous, a Greek word defined as: made of iron, Acts 12:10; Rev. 2:27; 9:9; 12:5; 19:15*. James Strong catalogued this in his 1890 concordance to help English readers study the original languages of the Bible.
siderous is a Greek word found in the New Testament.