incurvation

Noun

 * 1) The act of acquiring or being given a curved form; an instance of curving or bending.
 * 2) The state of being curved or bent; any curved shape or formation; curvature; a curve; a bend.
 * 3) A curving inwards; the condition of being curved inwards.
 * 4)  Bowing in reverence or worship.
 * 1)  Bowing in reverence or worship.