Twister -Pneumonoultramicroscopicsilicovolcanoconiosis
is, according to major dictionaries, a "factitious" word alleged to mean 'a lung disease caused by the inhalation of very fine silica dust of volcanic origin, causing inflammation in the lungs.'" A medical condition meeting the word's definition is normally called silicosis. It is commonly regarded as one of the longest words in the English language.

In Tito's Lucky Shell, this word was on a spelling quiz that Twister aced!

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