The term 'Cartesian Plane Divider' refers to an AXIS, which is a line that divides a two-dimensional plane into two parts. The term is derived from the French philosopher and mathematician Rene Descartes, who developed the concept of a Cartesian coordinate system. This system uses two perpendicular lines, or axes, to divide a plane into four quadrants. The x-AXIS is the horizontal line, and the y-AXIS is the vertical line. These two axes intersect at the origin, which is the point (0, 0). The Cartesian Plane Divider is used in mathematics to graph equations and to plot points on a coordinate plane.