σιδηρεῖα
From LSJ
πρὶν τοὺς ἰχθῦς ἑλεῖν σὺ τὴν ἅλμην κυκᾷς → you're mixing the sauce before catching the fish | don't count your chickens before they are hatched | don't count your chickens before they hatch | first catch your hare | first catch your rabbit | first catch your rabbit and then make your stew | first catch your hare, then cook it | first catch your hare, then cook him
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.