名詞 megalopolis:

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

meg.a.lop.o.lis

n.（名詞）
A region made up of several large cities and their surrounding areas in sufficient proximity to be considered a single urban complex.
大城市：由幾個大城市及其郊區(qū)所組成的地區(qū)，這些城市可以被看成是一個單一的城市復(fù)合體

來源：
megalo-
megalo-
Greek polis [city] * see pel…- 3
希臘語 polis [城市] *參見 pel…- 3

【引伸】
meg.alopolis.tic
adj.（形容詞）
meg.alopol.itan