y-axis
nounUK /ˈwaɪˌæksɪs/
US /ˈwaɪˌæksɪs/
The y-axis is the line that goes up and down on a graph.
On the chart, the y-axis shows how tall the plants grew.
RELATED WORDS
OTHER MEANINGS
2. In mathematics, the vertical reference line in a Cartesian coordinate system along which the y-coordinate is measured.
The point (3, 5) lies five units up the y-axis from the origin.
3. The vertical axis of a chart or graph that usually displays the dependent variable.
Sales figures were plotted along the y-axis while months ran along the x-axis.
4. In aviation, the vertical axis of an aircraft about which it yaws.
Rudder input rotates the plane around its y-axis.