Medically, it is the same as silicosis. The longest word entered in most standard english dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters Our definition is a lung disease caused by inhalation of very fine silicate or quartz dust. Pneumonoultramicroscopicsilicovolcanoconiosis is the longest word in the english language published in a popular 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.
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