What is the world’s longest word?

What is the world’s longest word?

pneumonoultramicroscopicsilicovolcanoconiosisMajor dictionaries The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis.

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