† hagiosidereObs.rare. [ad.Gr. ἁγιοσίδηρον, f. ἅγιος holy + σίδηρος iron.] (See quot.) 1730–6Bailey (folio), Hagiosidere, a Plate of Iron..which the Greeks under the Dominion of the Turks (being prohibited the Use of Bells) strike on, with a Hammer, to call the People to Church.