| Subject | English | Portuguese |
| comp., MS | x-axis | eixo x (The horizontal reference line on a grid, chart, or graph that has horizontal and vertical dimensions) |
| IMF. | X-axis | eixo dos x |
| earth.sc., environ. | x-axis vibration | oscilação |
| earth.sc., environ. | x-axis vibration | vibração eixo x |
| earth.sc., environ. | x-axis vibration | desvio |
| earth.sc., environ. | x-axis vibration | vibração estável |