cur ‧ va ‧ ture /ˈkɜːvətʃə $ ˈkɜːrvətʃər/ BrE AmE noun [uncountable and countable] technical
[ Date: 1400-1500 ; Language: Latin ; Origin: curvatura , from curvare ; ⇨ ↑ curve 2 ]
the state of being curved, or the degree to which something is curved
curvature of
the curvature of the Earth’s surface
He suffered from curvature of the spine.