Some people wanted to know whether this strange word exist: pneumonoultramicroscopicsilicovolcanocon is supposed to be the longest word in the English dictionary. I ventured out on my own to for some little research to see if this is listed in known online dictionaries. No, this word is NOT listed in any of those dictionaries.

This word looks like something that is coined out in the medicine-related professions, which may be why those general-purpose dictionaries did not list down this word. I tried looking into the some well-established medical dictionaries online and got the same results – their search engines turned up nothing.

Pneumonoultramicroscopicsilicovolcanocon is noun that’s supposed to mean a lung disease that was caused by breathing in fine particles of siliceous volcanic dust. The same word is also spelled as pneumonoultramicroscopicsilicovolcanoconiosis. I am unable to find out further if this is indeed true, as there are no reliable online resources that back up this definition. Someone mentioned that this was featured on a TV show, but this isn’t listed even in some news sites.

I heard that this was coined by someone named Everett Smith in 1935 just for the fun of investing a new longest word in his time.

If anybody had found an established online dictionary that lists down this word with its formal definition, let me know.