Noun: pneumonoultramicroscopicsilicovolcanoconiosis
- An artificially constructed word purporting to mean a lung disease caused by inhaling very fine silica dust; rarely used in medical contexts
"Students often cite pneumonoultramicroscopicsilicovolcanoconiosis as an example of an extremely long English word"
Encyclopedia: Pneumonoultramicroscopicsilicovolcanoconiosis