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Miscellaneous

What is the definition of the longest word in the world?

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ANSWER

Pneumonoultramicroscopicsilicovolcanoconiosis is one of the longest words in the English language and is a medical term referring to a type of silicosis.

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Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word entered in the most trusted English dictionaries. The definition is "a lung disease caused by inhalation of very fine silicate or quartz dust."

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