Pneumonoultramicroscopicsilicovolcanokoniosis vs. Pneumonoultramicroscopicsilicovolcanoconiosis — What's the Difference?

Alternative spelling of pneumonoultramicroscopicsilicovolcanoconiosis

Pneumonoultramicroscopicsilicovolcanoconiosis ( (listen)) is a word coined by the president of the National Puzzlers' League 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".Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.

Pneumonoultramicroscopicsilicovolcanokoniosis — which means a form of respiratory disease occurring{{SIC}} specially in miners caused by the inhalation of very fine silicate or quartz dust.

(nonce) A disease of the lungs, allegedly caused by inhaling microscopic silicate particles originating from the eruption of a volcano.