incurvation

plural incurvations

1. countableuncountableThe act or process of curving or bending; an instance of this.

   The incurvation or bending of a ray of light, incident on such a surface.

   1831, David Brewster, Memoirs of the Life of Sir I. Newton, published 1855, I. vii. 152

2. countableuncountableA curved or bent state, shape, or formation; curvature, a curve or bend, especially a curving inwards; the condition of being curved inwards.

   There my beauty lay down on her stomach, showing me, showing the thousand eyes wide open in my eyed blood, her slightly raised shoulder blades, and the bloom along the incurvation of her spine, and the swellings of her tense narrow nates clothed in black, and the seaside of her schoolgirl thighs.

   1955 September 15, Vladimir Nabokov, chapter 11, in Lolita, Paris: The Olympia Press […], →OCLC

3. countableobsoleteuncountableBowing in reverence or worship.