Longest Word What is the longest word?

[iGuest 3]

Longest ever place nameLongest Word

The longest place name I know of is

Llanfairpwllgwyngyllgogerychwyrndrobwllllantsyiliogogogoch

It is Welsh and it means; Saint Mary's (Church) by the white aspen and Saint Tsyilio's (Church) by the red cave.

My grand-dad is welsh and he taught me that word.

-reply by 11georsog3

[iGuest 3]

the longest word in the english language as of 2010 is 1,909 letters it is a term for the chemical formula C1289H2O51N34O375S8