(n.) The state of being convex; the exterior surface of a convex body; roundness.

aduncity aquilinity arching arcuation belly boss bump circularity colophon concameration concavity convolution crookedness curvation curvature curving curvity cylindricality dactylogram dactylograph decurvation decurvature dent dint embossment excrescence excurvation excurvature fingerprint footmark footprint footstep fossil footprint globosity globularity hookedness ichnite ichnolite impress impression imprint incurvation incurvature incurvity indent indentation indention lump orbicularity pad paw print pawmark pimple print pug pugmark recurvation recurvature recurvity rondure rotundity rotundness roundness seal sigil signet sinuosity sinuousness sphericality sphericalness sphericity spheroidicity spheroidity stamp step stud thumbmark thumbprint tortuosity tortuousness vaulting vestige