Before revision: A spline A spline, or the more modern term flexible curve, consists of a long strip fixed in position at a number of points that relaxes to form and hold a smooth curve passing through those points for the purpose of transferring that curve to another material.
After revision: A spline A spline, or the more modern term flexible curve, consists of a long strip fixed in position at a number of points whose tension creates, a smooth curve passing through those points for the purpose of transferring that curve to another material.