What is the longest word in webster dictionary that compose of 52 letters?

This copy and pasted from the following site: http://www.merriam-webster.com/help/faq/鈥?/a>

"The longest word that you'll find in our Webster's Third New International Dictionary, Unabridged, is pneumonoultramicroscopicsilicovolcanocon鈥?which has 47 letters." (A 52 letter word I could not find anywhere in the Webster Dictionary.)



Regards,

WarrenWhat is the longest word in webster dictionary that compose of 52 letters?
That is not the largest word, there is this. Follow the link of a 189,819 letter word(longest in the world and it's english!) Its amazing!!!!!



http://en.wikipedia.org/wiki/Titin