x-axis
nounUK /ˈeksˌæksɪs/
US /ˈeksˌæksɪs/
The line that goes left and right on a graph.
The numbers along the x-axis show how far to move sideways.
RELATED WORDS
OTHER MEANINGS
2. The horizontal axis of a coordinate system in mathematics.
Plot the point at 3 on the x-axis and 2 on the y-axis.
3. The horizontal axis of a chart or graph used to display data.
Months are listed along the x-axis of the sales chart.
4. The horizontal axis of a three-dimensional coordinate system.
In 3D space, the x-axis runs horizontally through the origin.