| Subject | English | Welsh |
| comp., MS | coordinate pair | pâr o gyfesurynnau (A pair of values representing the x- and y-coordinates of a point that are stored in a two-dimensional array that can contain coordinates for many points) |
| comp., MS | x-coordinate | cyfesuryn-x (The position of a point with reference to the x-axis, defined in conjunction with the y- and z-coordinates) |