CONVEXITY
Source: 566, 567
convexity|convexness. Convexity, or Convexness, n. a spherical form
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Con‐vex″i‐ty (?), n.; pl. Convexities (#). [[L. convexitas: cf. F. convexité.]] The state of being convex; the exterior surface of a convex body; roundness. A smooth, uniform convexity and rotundity of a globe. Bentley.