What is the longest word in the world?

Answer 1

Although two chemical terms (3,641 and 1,913 letters long) have appeared in the Guinness Book of World Records. They were withdrawn because they have never been used by chemists, and there is no theoretical limit to the length of possible legitimate chemical terms. A DNA molecule could have a name of over 1,000,000,000 letters if it was written out in full.
1185-letter " word is the chemical name for "Coat Protein, Tobacco Mosaic Virus, Dahlemense Strain".

acetylseryltyrosylserylisoleucylthreon...
phenylalanylvalylphenylalanylleucylser...
aspartylprolylisoleucylglutamylleucyll...
threonylserylserylleucylglycylasparagi...
glutaminylthreonylglutaminylglutaminyl...
glutaminylvalylglutaminylglutaminylphe...
tryptophyllysylprolylphenylalanylproly...
arginylphenylalanylprolylglycylasparty...
arginyltyrosylasparaginylalanylvalylle...
threonylalanylleucylleucylglycylthreon...
arginylasparaginylarginylisoleucylisol...
asparaginylglutaminylglutaminylserylpr...
threonylleucylaspartylalanylthreonylar...
alanylthreonylvalylalanylisoleucylargi...
asparaginylleucylvalylasparaginylgluta...
threonylglycylleucyltyrosylasparaginyl...
phenylalanylglutamylserylmethionylsery...
threonylserylalanylprolylalanylserine

Answer 2

I like superkaleefrageelistick...a word from the movie "Mary Poppins"...but it is an invented word...try these links:
http://en.wikipedia.org/wiki/Acetylseryl...
http://www.fun-with-words.com/word_longe...
http://members.aol.com/gulfhigh2/words11...
http://www.askoxford.com/asktheexperts/faq/aboutwords/longestword
http://users.tkk.fi/~jpakkane/sana.html

Answer 3

antidisestablishmentarianism

or

supercalifragilisticexpealadocious.

:)