concave
131convexo-concave — /kənˌvɛksoʊ kɒnˈkeɪv/ (say kuhn.veksoh kon kayv) adjective convex on one side and concave on the other …
132plano-concave — /pleɪnoʊ ˈkɒnkeɪv/ (say playnoh konkayv) adjective (of lenses) plane on one side and concave on the other …
