[cur.va.ture] n (1603) 1: the act of curving: the state of being curved
2: a measure or amount of curving; specif: the rate of change of the angle through which the tangent to a curve turns in moving along the curve and which for a circle is equal to the reciprocal of the radius 3 a: an abnormal curving (as of the spine) b: a curved surface of an organ