concavo-convex concavo-convex /ˌkɑnkəˈvoʊ kɑnˈvɛks/

adjective

1. Concave on one side and convex on the other with the concavity being greater than the convexity  ( concavo-convex )
   concave on one side and convex on the other with the concavity being greater than the convexity