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# y-axis

[ **wahy**-ak-sis ]

## noun

,

*Mathematics.*,

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

y-axis

## noun

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

y-axis

/ wī**′**ăk′sĭs /

- The vertical 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 y-axis^{1}

First recorded in 1925–30

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## Compare Meanings

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

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