The longest word in any of the major english language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis (45 letters), a word that refers to a lung disease contracted from the inhalation of very fine silica particles, [12] specifically from a volcano 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.
Medically, it is the same as silicosis. Our definition is a lung disease caused by inhalation of very fine silicate or quartz dust. The longest word entered in most standard english dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis with 45 letters
