σιδηρεῖα
From LSJ
ἀλλ' ἐπὶ καὶ θανάτῳ φάρμακον κάλλιστον ἑᾶς ἀρετᾶς ἅλιξιν εὑρέσθαι σὺν ἄλλοις → even at the price of death, the fairest way to win his own exploits together with his other companions | but even at the risk of death would find the finest elixir of excellence together with his other companions | but to find, together with other young men, the finest remedy — the remedy of one's own valor — even at the risk of death
English (LSJ)
τά, ironmines, Arist.Pol.1259a25, Thphr. HP 5.9.2, Lap.52, Str. 1.2.39: sg. σιδηρεῖον, τό, IG11(2).161 A 19 (Delos, iii B.C.).
Greek Monotonic
σιδηρεῖα: τά, τόπος κατεργασίας του σιδήρου, σιδηρουργείο, μεταλλεία σιδήρου, σε Αριστ.
Russian (Dvoretsky)
σῐδηρεῖα: τά железоделательные мастерские Arst.