What is the longest word in the english language?

[Jeunemaitre]

There is another word, longer than "antidisestablishmentarianism".  I am going to paste it here using quote tags.

I guess this is what happens when some organic chemist decides he wants to feel important. Incidentally, if you've ever looked very closely at the package insert info from prescription meds, the chemical names for some of those products are quite interesting (though not as long as the conglomeration that Deebye has given us to choke through). Take the following example: Zyvox (Registered trade mark of Pfizer Inc) is an antibiotic that I did a project on a little while ago. Its generic name is linezolid, and its chemical name is (S)-N-[[3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl] methyl]-acetamide.

Rather than long words, I like complicated ones, especially when they name or describe complicated things. My current favorite is heteroskedasticity. I'm not sure I really understand what it means, but it describes a quality of the variation of data in a regression analysis.

I also lately have been captivated by eunoia. I first heard it in a story on NPR (National Public Radio) about a "sound poet" named Christian Bok. He wrote a book called "Eunoia" (which is, I am lead to believe, the shortest word in the English language that uses all five vowels, and it means "beautify thinking"). This book is composed of five primary chapters, each using only words with a given vowel (the A chapter for instance). He required himself to use as many available words as possible (up to 80% of the available vocabulary I think) while preventing repetition of any word more than a few times. My wife gave me the book for Hanukah, but I haven't had a chance to start reading it yet.