(Mathematics)(in a system of coordinates) the distance from a point to the vertical or y -axis, measured parallel to the horizontal or x -axis; the x -coordinate (数)横坐标。 比较 ordinate
语源
early 17th cent. (denoting the part of a line between a point on it and the point of intersection with an ordinate): from modern Latin abscissa (linea) 'cut-off (line)', feminine past participle of abscindere (see abscission)