Longest Word

Many of us know that the longest word in the English dictionary is "Supercalifragilisticexpialidocious", but when I watched a video in youtube, I realized that i was wrong. “Pneumonoultramicroscopicsilicovolcanoconiosis” is the longest word in the English dictionary which means, a lung disease caused by inhalation of silica. Hope that I added something in your vocabulary.

:)