megalopoli

Noun

 * 1) * 1972, David Harvey, Society, the City, and the Space-economy of Urbanism (Association of American Geographers 1972, p. 14)
 * This problem has been made more serious in the contemporary city by the emergence of a new form of spatial ordering in the form of sprawling megalopoli.
 * 1) * 1976, Robert Theobald, Beyond Despair (Michigan 1976, p. 153)
 * With these developments came urbanization and centralization, which trends have culminated in the mega-farms and megalopoli of the present.
 * 1) * 1976, Robert Theobald, Beyond Despair (Michigan 1976, p. 153)
 * With these developments came urbanization and centralization, which trends have culminated in the mega-farms and megalopoli of the present.

Etymology
Derived from, with -s dropped on analogy with.

Noun

 * 1) megalopolis