what is the longest word in the english language?

Smiles

because there is a mile between S and s.

there is no words longer than a mile.

so its the longest word in english! :-)

Well it all depends how you define word!

Methionylthreonylthreonyl...isoleucine 189,819 Chemical name of the largest known protein Technical; not in dictionary; disputed whether it is a word

Lopado...pterygon 183 Longest word coined by a major author[1] Coined; not in dictionary; Greek transliteration

Pneumonoultramicroscopicsilicovolcanoconiosis 45 Longest word in a major dictionary[2] Technical; coined to be the longest word

Pseudopseudohypoparathyroidism 30 Longest non-coined word in a major dictionary[3] Technical

Floccinaucinihilipilification 29 Longest nontechnical word Coined

Antidisestablishmentarianism 28 Longest non-coined and nontechnical word

Honorificabilitudinitatibus 27 Longest word in Shakespeare's works

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If you were to write the first one in letters 0.85 centimeters wide, it would be over a mile in length! So it is in fact even longer than smiles!

Electroencephalographically (27 letters)

Hippopotomonstrosesquipedalian=pertaining to a very long word (30 letters)

Pneumonoultramicroscopic-

silicovolcanoconiosis.

(had to split and put dash in 'cause yahoo wanted to truncate it)

And for the other user: ANTIdisestablishmentarianism is 5th ;)

The one that comes after the announcer says: "We'll be right back after this word!"