The property of being concavo-convex.

(optics) having one side concave and the other convex

Flat or plane on one side and rounded on the other, such that the center is thicker than the edges.

(mathematics) The smallest convex set of points in which a given set of points is contained.

(optics) A lens having at least one convex surface, such that light passing through it may be brought to a focus.

plural of convex hull

(mathematics) A set which contains any convex combination of any (finite) subset of its points.

(linear algebra) A linear combination (of vectors in Euclidean space) in which the coefficients are non-negative and all add up to one.

Convex on both sides.

plural of convex function