\ˌbī-(ˌ)kän-ˈkāv, (ˈ)bī-ˈkän-ˌ\

Definition of BICONCAVE

: concave on both sides <biconcave vertebrae> <a biconcave lens>
bi·con·cav·i·ty \ˌbī-(ˌ)kän-ˈkav-ət-ē\ noun, plural bi·con·cav·i·ties

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