Source : Webster's Revised Unabridged Dictionary (1913)

Geodetic \Ge`o*det"ic\, Geodetical \Ge`o*det"ic*al\, a.
   Of or pertaining to geodesy; obtained or determined by the
   operations of geodesy; engaged in geodesy; geodesic; as,
   geodetic surveying; geodetic observers.

   {Geodetic line} or {curve}, the shortest line that can be
      drawn between two points on the elipsoidal surface of the
      earth; a curve drawn on any given surface so that the
      osculating plane of the curve at every point shall contain
      the normal to the surface; the minimum line that can be
      drawn on any surface between any two points.

Source : WordNet®

geodetic
     adj : of or relating to or determined by geodesy [syn: {geodesic},
            {geodesical}]