synclastic

from The Collaborative International Dictionary of English v.0.48

Synclastic \Syn*clas"tic\, a. [Pref. syn- + Gr. kla^n to break.]
   (Math. Physics)
   Curved toward the same side in all directions; -- said of
   surfaces which in all directions around any point bend away
   from a tangent plane toward the same side, as the surface of
   a sphere; -- opposed to anticlastic. --Sir W. Thomson.
   [1913 Webster]