Sentence:  Doxiadis may have seen the <WSD>Ecumenopolitan</WSD> picture emerging with particular force as he studied the Great Lakes Megalopolis in the 1960's. It is a less dense, yet less congested and certainly less resented concentration than the original Megalopolis on the Boston–New York–Washington axis. A similar schema could be proposed of a trans-european<!-- [sic] --> megalopolitan belt crossing the continent from the Mediterranean to the North Sea and the Irish Sea as urbanization proceeds along the Saône–Rhône and Rhine Valleys and penetrates the valleys of the Alps. We could visualize an «urbanized isthmus» from Rome (or Naples?) and Venice in the south to Amsterdam and Hamburg, jumping even over the Straits of Dover to include most of England. Such a formation may call for a new term, such as "megistopolis". 
Meaning of the word marked with <WSD> tags:  Of or characteristic of the Ecumenopolis.