A double ordinate refers to a graphical representation where a point is defined by two vertical measurements from a given baseline or axis. In geometric terms, it can be understood as the two coordinates (x, y) that describe the position of a point in a two-dimensional Cartesian coordinate system.
This concept is often used in fields such as engineering, architecture, and computer graphics, where accurately plotting points on a plane is crucial. For example, when drawing a shape or a structure, every point needs to be identified by its double ordinates, thereby enabling precise measurements and construction.