biconvex
bi·con·vex
adj\ˌbī-(ˌ)kän-ˈveks, (ˈ)bī-ˈkän-ˌ, ˌbī-kən-ˈ\
Definition of BICONVEX
: convex on both sides <a biconvex lens>
—bi·con·vex·i·ty \ˌbī-kən-ˈvek-sət-ē, -(ˌ)kän-\ (audio pronunciation) noun, plural ; bi·con·vex·i·ties
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