What does the word "boot" mean? I found this word "boot" in one book. The chapter was connected with ICING operations, and I found this word with little explanation:  


  A tube bonded to a surface, e.g. wing edge. When pressurized with fluid, it breaks up ice.


Please explain what is it?
What aircraft equipped with it?
Photos would be nice.
Versalog already told the core of the thing. Most prop aircraft which are approved for flights into known icing conditions have such boots to remove the ice from the wings leading edge.
Those boots are either inflated manually whenever you need them (by the press of a button of course), at regular intervals or automatically whenever ice is detected.

Check this picture, the black thing is the boot on a Dash 8's wing:


Link