What is another word for convexo-concave?
Pronunciation: [kənvˈiːksə͡ʊkɒnkˈe͡ɪv] (IPA) 
Convexo-concave is an adjective used to describe a shape or lens that has a convex surface on one side and a concave surface on the other. Some synonyms for the word include biconvex, plano-convex, meniscus, concavo-convex, and positive lens. Biconvex refers to an object with both sides curved outward, while plano-convex indicates a flat surface on one side and a convex surface on the other. Meniscus describes a lens with a concave and convex surface, and concavo-convex refers to a lens with a concave surface on one side and a convex surface on the other. Positive lenses bend light inward, and the term is often used interchangeably with convexo-concave.
