# abscissa

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Related to abscissae: ordinate

## abscissa:

see Cartesian coordinatesCartesian coordinates
[for René Descartes], system for representing the relative positions of points in a plane or in space. In a plane, the point P is specified by the pair of numbers (x,y
.

## abscissa

[ab′sis·ə]
(mathematics)
One of the coordinates of a two-dimensional coordinate system, usually the horizontal coordinate, denoted by x.

## abscissa

abscissa: P, any point; NP, abscissa
In the plane Cartesian coordinate system, the horizontal coordinate of a point on a plane; the x-coordinate, obtained by measuring the distance from the point to the y-axis along a line parallel to the x-axis.

## abscissa

the horizontal or x-coordinate of a point in a two-dimensional system of Cartesian coordinates. It is the distance from the y-axis measured parallel to the x-axis

## abscissa

(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.
References in periodicals archive ?
6) without median tooth at apex; length relation between abscissae of radial vein of fore wing (Fig.
3](x, y) (defining L) and on the mesh refinement strategy it can be shown that, if the collocation abscissae can be chosen to avoid a singular matrix W, then ||[W.
By a generalization of the above expression for HBW, it can be shown that in a family of visual pigment spectra satisfying the aforementioned assumptions, any two spectra are related such that at equal ordinates, the abscissae vary in proportion to [v.
The abscissae show time which progresses from right to left (1 cm = 30 secs), while the ordinates indicate both temperature (1 cm = 25 [degrees] C) and power (1 cm = 200 kW).

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