Wordnet 3.0
NOUN (1)
1. 
 one who practices geomancy; 
The Collaborative International Dictionary of English v.0.48:
Geomancer \Ge"o*man`cer\, n.
   One who practices, or is versed in, geomancy.
   [1913 Webster]
WordNet (r) 3.0 (2006):
geomancer
    n 1: one who practices geomancy