World From Top, By Klaus Lerdorf

In terms such as world map and world climate, world is used in the sense detached from human culture or civilization, referring to the planet Earth physically.
Etymology and usage
The English word world comes from the Old English weorold (-uld), weorld, worold (-uld, -eld), a compound of wer "man" and eld "age," which thus means roughly "Age of Man." The Old English is a reflex of the Common Germanic wira-alđiz, also reflected in Old Saxon werold, Old High German weralt, Old Frisian warld and Old Norse verǫld (whence the Icelandic veröld).