The Collaborative International Dictionary of English v.0.48:

Tellurian \Tel*lu"ri*an\, a. [L. tellus, -uris, the earth.]
   Of or pertaining to the earth. --De Quincey.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tellurian \Tel*lu"ri*an\, n.
   1. A dweller on the earth. --De Quincey.
      [1913 Webster]

   2. An instrument for showing the operation of the causes
      which produce the succession of day and night, and the
      changes of the seasons. [Written also tellurion.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

tellurian
    adj 1: of or relating to or inhabiting the land as opposed to
           the sea or air [syn: tellurian, telluric,
           terrestrial, terrene]
    n 1: an inhabitant of the earth [syn: tellurian, earthling,
         earthman, worldling]