Un-Learning a word in Spell Check

[terriyaki]

I accidentally made the spell check feature within Adium (which I think is the spell check feature throughout all Cocoa apps) learn a word rather than correct the word. Now the wrongly spelled word is skipped over in all applications that have spell check support.

How do I make it so the word is un-learned?

[emptyCup]

Select the word. Select Spelling... from the Edit Menu. Click on the Unlearn button at the bottom of the dialog.