Besides floccinaucinihilipilification, which I ran across as a youth in Fowler's, then there was pneumonoultramicroscopicsilicovolcanoconiosis, which I came across somewheres else, but there is some doubt. Best to read up on it in Wikipedia: http://en.wikipedia.org/wiki/Longest_word_in_English



Ceci n'est pas un seing.