单词	biconcave
释义	biconcave adjective bi·​con·​cave (ˌ)bī-(ˌ)kän-ˈkāv  -ˈkän-ˌkāv  : concave on both sides biconcavity ˌbī-(ˌ)kän-ˈka-və-tē  noun Word History First Known Use 1807, in the meaning defined above Medical Definition biconcave adjective bi·​con·​cave ˌbī-(ˌ)kän-ˈkāv  (ˈ)bī-ˈkän-ˌ  : concave on both sides biconcave vertebrae a biconcave lens
随便看	chalks chalks up chalkstones chalkware chalky chalky paper challa challah challahs challas challenge challenge cup challenge trophy challengeable challenged challenger challengers challenges challenging challengingly challies challis challises challot challoth

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