the rate of change (at a point) of the angle between a curve and a tangent to the curve
source: WordNet 3.0
the property possessed by the curving of a line or surface
source: WordNet 3.0
The act of curving, or the state of being bent or curved; a curving or bending, normal or abnormal, as of a line or surface from a rectilinear direction; a bend; a curve.
