biconvexity
/ˌbaɪkənˈvɛksəti/
noun
- The quality or state of being curved outward on both sides, like a lens.
- The biconvexity of the magnifying glass helps focus light to a single point.
- In optics, biconvexity is important for creating clear images.
- The jeweler admired the biconvexity of the cut gemstone.