lithomancy

from WordNet (r) 3.0 (2006)
lithomancy
    n 1: divination by means of stones or stone talismans
    
from The Collaborative International Dictionary of English v.0.48
Lithomancy \Lith"o*man`cy\, n. [Litho- + -mancy: cf. F.
   lithomancie.]
   Divination by means of stones.
   [1913 Webster]
    

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