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1. Oxford American Dictionary

   concavo-convex

   • IPA[känˌkāvōˌkänˈveks]

   美式

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

   concavo-convex

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

   Oxford Dictionary