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ecumenopolis

noun ecu·me·nop·o·lis \ ˌekyəmə̇ˈnäpələs , eˌkyüm- \
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Definition of ecumenopolis

plural -es
: a single city encompassing the whole world that is held to be a possibility of the future

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Origin and Etymology of ecumenopolis

New Greek oikoumenopolis, from Greek oikoumenē world + -o- + -polis

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