The longest word in the English dictionary is pneumonoultramicroscopicsilicovolcanconioisi

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The longest word in the English dictionary is pneumonoultramicroscopicsilicovolcanconioisi

By: Patrick Coveny, Fall Editor and Reporter

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Pneumonoultramicroscopicsilicovolcanconioisi has 45 letters and is a lung disease caused by inhaling ash.

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