incurvation | (n) the action of creating a curved shape |
concave shape | (n) a shape that curves or bends inward, Syn. incurvature, incurvation, concavity |
Incurvation | n. [ L. incurvatio: cf. F. incurvation. ] [ 1913 Webster ] An incurvation of the rays. Derham. [ 1913 Webster ] |