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bi·con·vex .bī-(.)kän-'veks, (')bī-'kän-., .bī-kən-' adj convex on both sides <a \biconvex lens>
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adj.
having a surface on each side that curves outwards. Biconvex lenses are used to correct long-sightedness. Compare biconcave.
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bi·con·vex (bi″kon-veksґ) having two convex surfaces, as the opposite sides of a structure.Medical dictionary. 2011.