How to Clear Wordpress/Spellcheck Dictionary?

Hi,

Can someone tell me how to clear or reset my dictionary in Wordpress? Right now I must have a few words where I added the incorrect spelling to my dictionary by mistake. As a result when I do a spellcheck it is not picking up the misspelled word because I must have added it the dictionary.

I guess I do not know if this is actually a Wordpress dictionary thing or just a general dictionary my computer uses because this also happens when using other programs. In either event I dont know how to clear or remove words I do not want added to the dictionary.

Thanks!