Short for Non-Uniform Rational B-Spline, a mathematical representation of a 3-dimensional object. Most CAD/CAM applications support NURBS, which can be used to represent analytic shapes, such as cones, as well as free-form shapes, such as car bodies.
Dynamic NURBS Describes dynamic NURBS (D-NURBS), which enable you to interactively "sculpt" curves and surfaces. Using D-NURBS, you can adjust the curves and surfaces not only by manually adjusting control points and their associated weights (as in traditional NURBS), but can simulate forces and shape constraints.