geomancy (n.) Look up geomancy at Dictionary.com
"art of divination by means of signs derived from the earth," late 14c., from Old French géomancie, from Medieval Latin geomantia, from late Greek *geomanteia, from geo-, comb. form of ge "earth" (see Gaia) + manteia "divination" (see -mancy). Related: Geomantic; geomantical.