What is the longest word in webster?

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Pneumonoultramicroscopicsilicovolcano... is the largest word found in major dictionaries. It is a form of lung disease. This 45-letter word, referred to as P45, first appeared in the 1939 supplement to the Merriam-Webster New International Dictionary, Second Edition. It is listed in the current edition of several dictionaries.

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First answer by Fallon Galbraith. Last edit by Fallon Galbraith. Contributor trust: 15 [recommend contributor]. Question popularity: 1 [recommend question]

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