what is the longest word in the dictionery?

Answer 1

the longest word that is actually a word and not a medical term, or a word that is only used in the context of 'the longest words,' that is to say- most of the words listed in the other answers are either medical terms or they are words that were created for the specific purpose of being the longest word- the longest word (non medical or created for long word purposes) is antidisestablishmentarianism

Answer 2

There are no words in a... dictionEry, but there are a lot in a dictionAry. Of course, you want a want from a dictionery, so, sorry, as I said, there are no words there...

Answer 3

osseocarnisanguineoviscericartilaginonervomedullary (51 letters),
http://www.askoxford.com/asktheexperts/faq/aboutwords/longestword?view=uk

Answer 4

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...i think :P