pneumonoultramicroscopicsilicovolcanoconiosis
Appearing in the Oxford English Dictionary, this 45-letter word for a disease is the longest English word that is defined in a major dictionary.
![Pneumonoultramicroscopicsilicovolcanoconiosis Appearing In The Oxford English Dictionary This 45letter Word For A Disease Is The Longest English Word That Is De class=](https://ph-static.z-dn.net/files/dc5/ad2c42247a9f45ff221cf466d4e0c560.jpg)