Fractal

A fractal is a geometric shape that can be subdivided into parts such that each of these parts is exactly or approximately equal to the whole.

Examples of fractals are the Mandelbrot set, Cantor set, [Sierpinski triangle]?, [Peano curve]?, [Koch snowflake]? and Lorenz attractor.

Fractals can be used to describe many highly irregular real-world objects, such as clouds, mountains, turbulence, and coastlines.

For more information see:

http://www.faqs.org/faqs/fractal-faq/