1. [n]  (mathematics) the shortest line between two points on a mathematically defined surface (as a straight line on a plane or an arc of a great circle on a sphere)
2. [adj]  of or relating to or determined by geodesy
3. [adj]  of or resembling a geodesic dome

GEODESIC is a 8 letter word that starts with G.

1. \Ge`o*des"ic\ (j[=e]`[-o]*d[e^]s"[i^]k), Geodesical
   

2. \Ge`o*des"ic\, n.
   A geodetic line or curve.