a curved line formed by two or more vertices, or "control points", and a mathematical formula describing the curve(s) between them

a polynomial curve or surface used to represent spatial variation smoothly.

A curved line segment. See the section in the manual on splines. The splines used in PfaEdit are all third order Bézier splines.

A curve used to define the shape of a model and defined by the position of its control points.

A rectangular piece fitting grooves like key seats in a hub and a shaft, so that while the one may slide endwise on the other, both must revolve together; a feather; also, sometimes, a groove to receive such a rectangular piece.

A long, flexble piece of wood sometimes used as a ruler.

It is a thin strip of material, like wood or metal, which is inserted into the edges of two stones pieces or stone tiles to make a butt joint between them.

A thin wood strip that is set into mating grooves in two joined pieces of stock. The grain direction of the spline is perpendicular to the joint to strengthen the joint. Splines are most commonly used in mitered corners of picture frames and for joining stock together edge-to-edge for tabletops and similar projects.

a shape make of two or more corners (i

a usually curvy pattern used to guide someone shaping something large, such as a boat hull

A shape created from a line.