Plural of archdiocese; multiple large church districts each governed by an archbishop.
Plural form of 'archdiocese,' which combines 'arch-' (principal) with 'diocese.' The word entered English from Late Latin 'archidioecesis,' used in ecclesiastical administration from the medieval period onward.
Archdioceses are unevenly distributed globally—there are far more archdioceses in Europe and the Americas than in Asia or Africa, making the word a linguistic marker of historical church expansion and colonial influence.
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