oh, and if you watch sesame street, you'll know that big bird once thought that "abcdefghijklmnopqrstuvwxyz" was a word. i guess that would win.

actually, i doubt you can top that unless you map out the human genome and put down it's chemical name, lol. titin happens to be the largest protein-- ever

protein: titin chemical formula: C132983H211861N36149O40883S693 letters: 189 819 beat this one : ) http://wikisource.org/wiki/Methionylthreonylthreonyl...isoleucine

actually, the official longest word would be the chemical name for the largest protein, titin. it clocks in at 189,819 letters, chemical formula C132983H211861N36149O40883S693. I doubt I can post it here, so here's the link on wikipedia.