pixmap

pixmap

(Contraction of "pixel map"). A 3 dimensional array of bitscorresponding to a 2 dimensional array of pixels. It isused, for example, in the X Window System to describe amemory region where graphics can be drawn without affectingthe screen. Typically this is used for the efficient handlingof expose events, icon images or for animation. Comparebitmap.

[Xlib Guide].