megacosm

From French mégacosme, ultimately from Ancient Greek μεγα- (mega-) + κόσμος (kósmos).

megacosm (plural megacosms)

1. (now rare, historical) A macrocosm. [from 17th c.]
   • 2006, Thomas Pynchon, Against the Day, Vintage, published 2007, page 255:

     Howsoever, over their cloistering walls and into the map of the megacosm, the two professors continued to launch their cadres of spellbound familiars and enslaved disciples.

megacosm n (uncountable)

1. alternative form of megacosmos