ge·o·man·cy (jē'ə-mān'sē) n. Divination by means of lines and figures or by geographic features.
[Middle English geomancie, from Medieval Latin geōmantia, from Late Greek geōmanteia, divination by signs from the earth : Greek geō-, geo- + Greek -manteia, -mancy.] ge'o·man'cer n., ge'o·man'tic (-tĭk) adj.