pneumonoultramicroscopicsilicovolcanoconiosis

Definition

The longest word in English dictionaries, referring to a lung disease caused by inhaling volcanic dust and silica particles—created as a linguistic novelty by the National Puzzlers' League.

Example Usage

My teacher challenged us to spell pneumonoultramicroscopicsilicovolcanoconiosis, and nobody got past the first ten letters.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=pneumonoultramicroscopicsilicovolcanoconiosis&defid=15777177)

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