cur·va·ture 
/ˈkɚvətʃɚ/ noun
/ˈkɚvətʃɚ/ noun 1 technical : the amount that something is curved [count] ▪ The lenses have different curvatures. — often + of ▪ the curvature of the earth [noncount] ▪ The machine measures the eyeball's degree of curvature. 2 [noncount] medical : a condition in which your spine is curved in an abnormal way
▪ a disease that can cause curvature of the spine
▪ a disease that can cause curvature of the spine
