The quality or state of being convex; the property of having a curved surface that bulges outward.
Convex + -ness (noun-forming suffix). A parallel formation to 'convexity,' expressing the same mathematical property through English morphology.
Why do we have both 'convexity' and 'convexness' in English? Because -ness is productive (anyone can add it), while -ity is more formal and Latin-derived. Scientists use 'convexity,' but 'convexness' is more colloquial.
Complete word intelligence in one call. Free tier — 50 lookups/day.