Source : Webster's Revised Unabridged Dictionary (1913)

   5. (Her.) Represented in a leaping position; as, a lion
      salient.

   {Salient angle}. See {Salient}, a., 4.

   {Salient polygon} (Geom.), a polygon all of whose angles are
      salient.

   {Salient polyhedron} (Geom.), a polyhedron all of whose solid
      angles are salient.

Source : WordNet®

salient angle
     n : an angle pointing outward; an interior angle of a polygon
         that is less than 180 degrees [ant: {reentrant angle}]