Incurvation
Incurvation , noun
[Latin incurvatio: compare French incurvation.]
1.
The act of bending, or curving.
2.
The state of being bent or curved; curvature.
An incurvation of the rays.
3.
The act of bowing, or bending the body, in respect or reverence.
The incurvations of the knee.