This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An object in code that behaves like a class but is not a true class.

"* Find out whether the user has been to various sites such as GMail, Facebook, Yahoo, Flickr etc. using the Javascript “visited” CSS pseudoclass hack."