Origin: L. Ordinatus, p. P. Of ordinare. See Ordain.
(Science: geometry) The distance of any point in a curve or a straight line, measured on a line called the axis of ordinates or on a line parallel to it, from another line called the axis of abscissas, on which the corresponding abscissa of the point is measured.
The ordinate and abscissa, taken together, are called coordinates, and define the position of the point with reference to the two axes named, the intersection of which is called the origin of coordinates. See Coordinate.