X

x-axis

See x-coordinate.

x-coordinate

A point on the horizontal axis of a grid, scale, or page dimension. Other term: x-axis. See also: y-coordinate.

xerography

An imaging method that electrostatically charges ink toner particles, which are attracted to areas of the paper that have been given an electrical charge. The dry toner is then heat fused to the paper, forming an image. This is the basis of almost all office copy machines.

x-height

The height of a type character that has no ascenders or descenders (e.g., a, c, e, m, o, x, and z.). Typically the height of x and z are used as representatives of a type face family's x-height. Other term: z-height.

x-line

The horizontal line that would indicate the top of non-ascender, lowercase letters such as a, c, e, m, o, p, x, y, and z. Other term: mean line.

x-y coordinates

A mathematical description of an element's position on a page.