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# x-axis

[ **eks**-ak-sis ]

## noun

,

*Mathematics.*,

*plural***x-ax·es**[eks, -ak-seez].- Also called
**axis of abscissas.**(in a plane Cartesian coordinate system) the axis, usually horizontal, along which the abscissa is measured and from which the ordinate is measured. - (in a three-dimensional Cartesian coordinate system) the axis along which values of
*x*are measured and at which both*y*and*z*equal zero.

x-axis

## noun

- a reference axis, usually horizontal, of a graph or two- or three-dimensional Cartesian coordinate system along which the
*x-*coordinate is measured

x-axis

/ ĕks**′**ăk′sĭs /

- The horizontal axis of a two-dimensional Cartesian coordinate system.
- One of the three axes of a three-dimensional Cartesian coordinate system.

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## Word History and Origins

Origin of x-axis^{1}

First recorded in 1925–30

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## Compare Meanings

How does *x-axis* compare to similar and commonly confused words? Explore the most common comparisons:

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## Example Sentences

The value-curve of gold, expressed in money, is a straight line, parallel to the X axis.

From Project Gutenberg

The tracer is then placed on the x-axis of the y-curve and clamped to the carriage, and the instrument is ready for use.

From Project Gutenberg

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