σιδηροβασταγή
From LSJ
δόξειε δ' ἂν τῆς κυριωτάτης καὶ μάλιστα ἀρχιτεκτονικῆς. τοιαύτη δ' ἡ πολιτικὴ φαίνεται → It would seem to belong to the most authoritative art and that which is most truly the master art. And politics appears to be of this nature.
English (LSJ)
ἡ,
A provision, supply of iron, PMasp.57.12 (vi A.D.), PFlor.297.41 (vi A.D.).