Pneumonoultramicroscopicsilicovolcaniosis definition, What is pneumonoultramicroscopicsilicovolcaniosis?

Having a hard time pronouncing pneumonoultramicroscopicsilicovolcaniosis? Then you might be getting headaches as to what it is.
Pneumonoultramicroscopicsilicovolcaniosis is pronounced:

pneumonoultramicroscopicsilicovolcaniosis definition:
Pneumonoultramicroscopicsilicovolcaniosis is a lung disease caused by the inhalation of very fine silica dust causing inflammation in the lungs. more on http://en.wikipedia.org/wiki/Pneumonoultramicroscopicsilicovolcanoconiosis

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