'Incurvation' definitions:

Definition of 'incurvation'

From: WordNet
noun
A shape that curves or bends inward [syn: concave shape, concavity, incurvation, incurvature]
noun
The action of creating a curved shape

Definition of 'Incurvation'

From: GCIDE
  • Incurvation \In`cur*va"tion\, n. [L. incurvatio: cf. F. incurvation.] [1913 Webster]
  • 1. The act of bending, or curving. [1913 Webster]
  • 2. The state of being bent or curved; curvature. [1913 Webster]
  • An incurvation of the rays. --Derham. [1913 Webster]
  • 3. The act of bowing, or bending the body, in respect or reverence. "The incurvations of the knee." --Bp. Hall. [1913 Webster]