what does this light mean?

What does this light mean that I have on? Is it a filter light or something? If so all filters have been changed. Sorry for the poor cell phone picture quality but you get the idea. It's the light on the left hand side, it's the only light right beside the temp gauge.
http://img.photobucket.com/albums/v521/MattsterL/2.jpg
http://img.photobucket.com/albums/v521/MattsterL/21.jpg

Nevermind, I forgot I still have the owners manual. It's the engine coolant light.