Pneumonoultramicroscopicsilicovolcanoconiosis (/ˌnjuːmənoʊˌʌltrəˌmaɪkrəˈskɒpɪkˌsɪlɪkoʊvɒlˌkeɪnoʊˌkoʊniˈoʊsɪs/ (listen)[1][2]) 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]
