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Pneumonoultramicroscopicsilicovolcanoconiosis () is an English word that refers to a lung disease that is otherwise known as silicosis. It is the longest word in the English language published in a dictionary, the Oxford English Dictionary. According to the ''Oxford English Dictionary'', it is "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. ==Etymology== This word was invented by Everett M. Smith, president of the National Puzzlers' League (N.P.L.), at its annual meeting. The word figured 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": 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 name 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.〔 〕 This 45-letter word, referred to as "P45",〔Cole, Chris. (1989.) ("The Biggest Hoax" ). ''Word Ways: The Journal of Recreational Linguistics'', via wordways.com. Retrieved on 2007-10-08.〕 first appeared in the 1939 supplement to the ''Merriam-Webster New International Dictionary, Second Edition''.〔Miller, Jeff. ("A collection of word oddities and trivia: page 11, long words" ). (Personal website.) Retrieved on 2007-10-08.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pneumonoultramicroscopicsilicovolcanoconiosis」の詳細全文を読む スポンサード リンク
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