What is the longest english word

pneumonoultramicroscopicsilicovolcanoconiosis

肺病的一種：由造成呼吸了火山裡的微小的沙塵或石英塵土粒子而引起的

Bababadal­gharagh­takammin­arronn­konn­bronn­tonn­erronn­tuonn­thunn­trovarrhoun­awnskawn­toohoo­hoordenen­thurnuk（100個字母）為非正規英語，為作家詹姆斯喬伊斯在小說Johnngans Wake中自創的字，形容阿當和夏娃死亡時雷電的形聲詞

Lip-smackin-thirst-quenchin-acetastin-motivatin-good-buzzin-cool-talkin-high-walkin-fast-livin-ever-givin-cool-fizzin（100個字母）是麥當勞餐廳在1970年的廣告口號，用作形容巨無霸。

2006-11-27 21:01:59 補充：
Lopadotemachoselachogaleokranioleipsanodrimhypotrimmatosilphio-paraomelitokatakechymenokichlepikossyphophattoperisteralektryonop-tekephalliokigklopeleiolagoiosiraiobaphetraganopterygon, a word of 183 letters that describes a dish by stringing together its ingredients

supercalifragilisticexpialidocious

definition: stunningly fantastic

pneumonoultramicroscopicsilicovolcanoconiosis