Definition of "pseudoclass" []

• An object in code that behaves like a class but is not a true class. (noun)

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• "* Find out whether the user has been to various sites such as GMail, Facebook, Yahoo, Flickr etc. using the Javascript “visited” CSS pseudoclass hack."
• "Regarding cursor states - as ChrisB has said above, the cursor property shouldn't be set on the: hover pseudoclass as this is a bit nonsensical."