Polygon

n. [Gr. πολυγωνος, from πολυς, many, and γωνος, γωνία, angle; Fr. poly-gone, It. & Sp. poligono.] (Geom.)

A plane figure of many angles, and consequently of many sides; especially, one whose perimeter consists of more than four sides.

Polygon of forces (Mech.), a polygonal figure, the sides of which, taken successively, represent, in length and direction, several forces acting simultaneously upon one point, so that the side necessary to complete the figure represents the resultant of those forces.

n. [See supra.] (Bot.) A plant of the genus Polygonium; knotweed;—so called from its numerous joints.