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What is pneumonoultramicroscopicsilicovolcanoconiosis? noun | A lung disease caused by the inhalation of very fine silicate or quartz dust, causing inflammation in the lungs. While pneumonoultramicroscopicsilicovolcanoconiosis is an actual medical term, most people will never hear a doctor (attempt to) say this absurdly long word. Pneumonoultramicroscopicsilicovolcanoconiosis is an obscure term that some people claim to be one of the longest words in the English language. Pneumonoultramicroscopicsilicovolcanoconiosis (/ˌnju mənoʊˌʌltrəˌmaɪkrəˈskɒpɪkˌsɪlɪkoʊvɒlˌkeɪnoʊˌkoʊniˈoʊsɪs/ (listen)12) is a word coined by the then president of the National Puzzlers' League, Everett M. Smith, as a synonym for the disease known as silicosis. It is the longest word in the English language published in a dictionary, Oxford Dictionaries, which defines it as "an artificial long word said to mean a lung disease caused by inhaling very fine ash and sand dust".3
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