Which major dictionary had to be recalled in 2001 due to the accidental inclusion of a made-up word that had slipped through the editorial process?

In the world of language and linguistics, even dictionaries aren't immune to mistakes! This trivia question explores one of the most significant dictionary recalls in publishing history. Product quality matters as much in reference materials as in any other industry, and sometimes errors slip through despite rigorous editorial processes. Test your knowledge about this fascinating intersection of publishing, linguistics, and product quality control!

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The New Oxford American Dictionary
Merriam-Webster's Collegiate Dictionary
American Heritage Dictionary
Cambridge Advanced Learner's Dictionary