# x-axis

## Definitions

### Computing

- noun the horizontal axis of a graph

### Electronics

- In a two-dimensional Cartesian coordinate system, the horizontal axis, the other being the y-axis. Also, one of the three mutually-perpendicular
__axes__in a three-dimensional Cartesian__coordinate system__, the others being the y- and z-axes. - One of three reference
__axes__in a__quartz crystal__, the others being the y- and z- axes. - In a CRT, the axis representing the
__horizontal deflection__of the electron beam.