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1. Oxford American Dictionary

   convexo-concave

   • IPA[kənˌveksōˈkänkāv]

   美式

   • adj.
     (of a lens) convex on one side and concave on the other and thickest in the center.
2. • 更多解釋

   convexo-concave

   • IPA[kənˌvɛksəʊkɒnˈkeɪv]

   英式

   • adj.
     (of a lens) convex on one side and concave on the other and thickest in the centre.

   Oxford Dictionary