1690s (Englished as abscisse), from Latin abscissa (linea) "(a line) cut off," or (recta ex diametro) abscissa "(a line) cut off (from the diameter)," fem. of abscissus "cut o [..]

the horizontal coordinate of a point in a two-dimensional Cartesian coordinate system. • the abscissa is the first term in an ordered pair.

The horizontal coordinate in a two-dimensional system of rectangular Cartesian coordinates; usually denoted by x; also, the horizontal axis of any graph.

The first element in a coordinate pair. When graphed in the coordinate plane, it is the distance from the y-axis. Frequently called the x coordinate.

the V-axis of a graph used to display data- horizontal axis going from left to right

This is the X coordinate on a Cartesian graph. The Cartesian system is the one that looks like a grid full of squares.

The value corresponding to the horizontal distance of a point on a graph from the Y axis. The X coordinate.

(n) the value of a coordinate on the horizontal axis

The x coordinate on an x,y graph (y is the ordinate).

The horizontal line of a graph, used to record the time that behavior occurred.

The horizontal or x-axis on a graph. In applied behavior analysis, the abscissa usually depicts successive trials or the passage of time, such as days.

<mathematics> The horizontal or x coordinate on an (x, y) graph; the input of a function against which the output is plotted. The vertical or y coordinate is the "ordinate". See Cartesian coordinates. (01 Mar 1997)

<geometry> One of the elements of reference by which a point, as of a curve, is referred to a system of fixed rectilineal coordinate axes. When referred to two intersecting axes, one of them called the axis of abscissas, or of X, and the other the axis of ordinates, or of Y, the abscissa of the point is the distance cut off from the axis of X [..]

The horizontal coordinate of a set of rectangular coordinates. Also used in a similar sense in connection with oblique coordinates.

the coordinate of a point in a plane Cartesian coordinate system obtained by measuring parallel to the x-axis ("the 'x' value").

(geometry) The first of the two terms by which a point is referred to, in a system of fixed rectilinear coordinate (Cartesian coordinate) axes. The abscissa is also known as the "x" coordinate of a [..]