noun (plural y-axes)
The secondary or vertical axis of a system of coordinates, points along which have a value of zero for all other coordinates.
- Start to draw the slope at the left-hand vertical line of grid, which is the y-axis.
- The x-axis shows the population in millions whilst the y-axis shows different age ranges.
- Consecutive locations outlining an ' impact corridor ' are linked along the y-axis.
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