The longest word in any of the major English language dictionaries is
pneumonoultramicroscopicsilicovolcanoconiosis
a 45-letter word which refers to a lung disease contracted from the inhalation of very fine silica particles specifically from a volcano.
pneumonoultramicroscopicsilicovolcanoconiosis
a 45-letter word which refers to a lung disease contracted from the inhalation of very fine silica particles specifically from a volcano.

