x-axis

noun

x-ax·​is ˈeks-ˌak-səs 

1

: the axis in a plane Cartesian coordinate system parallel to which abscissas are measured

2

: one of the three axes in a three-dimensional rectangular coordinate system

Example Sentences

Recent Examples on the Web

That’s because the roots of a function occur where its graph crosses the horizontal line y=0 (the x-axis), and in general, those intersections aren’t symmetric about the cubic’s special point of symmetry. —Patrick Honner, Quanta Magazine, 24 Mar. 2023

Word History

First Known Use

1886, in the meaning defined at sense 1

Kids Definition

x-axis

noun

x-ax·​is

ˈek-ˌsak-səs

: the horizontal axis in a plane coordinate system along which or parallel to which abscissas are measured compare y-axis