In graphics and image-editing programs, the brush tool is an element of the
painting tool that allows you to select a
brush shape (square, circle, oval and so on) and also the the thickness in
pixels you want to paint on your image with. As you move your cursor over the
image it leaves a stroke of color. See also
painting tool.
See also "Graphics
Software Terminology" in the
Quick Reference section of Webopedia.