I accidentally saved a wrong word into my dictionary while right clicking, do you know how to remove it?

I'm using a Mac. I typed a wrong word, right clicked it and accidentally press "learn spelling".I accidentally saved a wrong word into my dictionary while right clicking, do you know how to remove it?
Look in the middle of page 235 of this book



http://books.google.com/books?id=DpOcQC2鈥?/a>

pdd nos

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