Source : Webster's Revised Unabridged Dictionary (1913)

Geostatic \Ge`o*stat"ic\, a. [Gr. ge`a, gh^, earth + E. static.]
   (Civil Engin.)
   Relating to the pressure exerted by earth or similar
   substance.

   {Geostatic arch}, an arch having a form adapted to sustain
      pressure similar to that exerted by earth. --Rankine.