megalopolis \ ˌme-gə-ˈlä-pə-ləs \ noun

: a very large urban complex (usually involving several cities and towns)

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The word megalopolis has appeared in 10 articles on NYTimes.com in the past year, including on Aug. 12 in “Photos Show the Devastation of Monsoons Ravaging India and Pakistan” by Maria Abi-Habib, Saba Imtiaz and Ayesha Venkataraman: