Pneumonoultramicroscopicsilicovolcanoconiosis (// ( listen)) is a word invented by the president of the National Puzzlers' League as a synonym for the disease known as silicosis. It is the longest word in the English language published in a dictionary, the Oxford English Dictionary, which defines it as "an artificial long word said to mean a lung disease caused by inhaling very fine ash and sand dust."
Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs. It is a type of pneumoconiosis.
This word was invented in the annual meeting of the National Puzzlers' League (N.P.L.) by its president Everett M. Smith. The word featured in the headline for an article published by the New York Herald Tribune on February 23, 1935, titled "Puzzlers Open 103rd Session Here by Recognizing 45-Letter Word":
Pneumonoultramicroscopicsilicovolcanoconiosis succeeded electrophotomicrographically as the longest word in the English language recognized by the National Puzzlers' League at the opening session of the organization's 103rd semi-annual meeting held yesterday at the Hotel New Yorker. The puzzlers explained that the forty-five-letter word is the synonym of a special form of pneumoconiosis caused by ultra-microscopic particles of silica volcanic dust...
Subsequently, the word was used in a puzzle book, Bedside Manna, after which time, members of the N.P.L. campaigned to include the word in major dictionaries.
In popular culture
On 14 July 2017, sixteen-year-old Michael Bryan used the word during a British Youth Council Youth Select Committee meeting to highlight the "grave inconsistency" of addressing health conditions, with physical problems given greater precedent than mental health issues. It did not become the longest word to appear printed in Hansard, the official transcripts of Parliamentary debates in Britain, because the meeting was not a parliamentary proceeding. He claimed that the silliness of the term in question acted to bring to light the equivalent silliness of the disparity of esteem given to mental and physical issues.
American songwriter Tim Siler used the word as the basis for a song of the same name.
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- "Pneumonoultramicroscopicsilicovolcanoconiosis". Oxford Dictionaries. Oxford University Press. Retrieved 2017-10-10.
- "Pneumonoultramicroscopicsilicovolcanoconiosis". Merriam-Webster Dictionary.
- "Definition of pneumonoultramicroscopicsilicovolcanoconiosis in Oxford dictionary (British and World English)". Oxford Dictionaries. Oxford University Press. Archived from the original on 2012-07-19.
- Cole, Chris (1999). Wordplay, A Curious Dictionary of Language Oddities. Sterling Publishing Co., Inc. pp. 106–107. ISBN 0-8069-1797-0.
- Cole, Chris. (1989.) "The Biggest Hoax" Archived 2014-08-10 at the Wayback Machine.. Word Ways: The Journal of Recreational Linguistics, via wordways.com. Retrieved on 2007-10-08.
- Miller, Jeff. "A collection of word oddities and trivia: page 11, long words". (Personal website.) Retrieved on 2007-10-08.
- BBC: Boy uses 'longest word' in Parliament
- Tim Siler – "Pneumonoultramicroscopicsilicovolcanoconiosis" live @ Canal Street Tavern, 2010-04-08