# x-axis

[ eks-ak-sis ]

noun,plural x-ax·es [eks-ak-seez]. /ˈɛksˌæk siz/. Mathematics.
1. 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.

2. (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.

## Compare Meanings

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.

## Origin of x-axis

1
First recorded in 1925–30

## Words Nearby x-axis

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use x-axis in a sentence

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

The Value of Money | Benjamin M. Anderson, Jr.
• 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.

## British Dictionary definitions for x-axis

x-axis

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

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for x-axis

x-axis

[ ĕksăk′sĭs ]

1. The horizontal axis of a two-dimensional Cartesian coordinate system.

2. One of the three axes of a three-dimensional Cartesian coordinate system.