You searched for: “synclastic
synclastic (adjective)
1. 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.
2. Property of a surface or portion of a surface for which the centers of curvature of the principal sections at each point lie on the same side of the surface.