自己Google了好久，根据：
http://www.sciforums.com/showthread.php?t=43238
http://www.cerocscotland.com/forum/fun-games/6926-word-disassociation.html
http://www.usingenglish.com/forum/ask-teacher/5380-longest-words.html
发现最长的英文单词是：

包含267钟氨基酸的一种蛋白质，共1909个字母

Tryptophan synthetase A protein, an enzyme that has 267 amino acids, and makes a record of 1,909 letters. The chemical notation is

Quote:

methionylglutaminylarginyltyrosylglutamylserylleuc ylphenylalanylalanylglutaminylleucyllysylglutamyla rginyllysylglutamylglycylalanylphenylalanylvalylpr olylphenylalanylvalylthreonylleucylglycylaspartylp rolylglycylisoleucylglutamylglutaminylserylleucyll ysylisoleucylaspartylthreonylleucylisoleucylglutam ylalanylglycylalanylaspartylalanylleucylglutamylle ucylglycylisoleucylprolylphenylalanylserylaspartyl prolylleucylalanylaspartylglycylprolylthreonylisol eucylglutaminylaspfraginylalanylthreonylleucylargi nylalanylphenylalanylalanylalanylglycylvalylthreon ylprolylalanylglutaminylcysteinylphenylalanylgluta mylmethionylleucylalanylleucylisoleucylarginylglut aminyllysylhistidylprolylthreonylisoleucylprolylis oleucylglycylleucylleucylmethionyltyrosylalanylasp araginylleucylvalylphenylalanylasparaginyllysylgly cylisoleucylaspartylglutamylphenylalanyltyrosylala nylglutaminylcysteinylglutamyllysylvalylglycylvaly laspartylserylvalylleucylvalylalanylaspartylvalylp rolylvalylglutaminylglutamylserylalanylprolylpheny lalanylarginylglutaminylalanylalanylleucylarginylh istidylasparaginylvalylalanylprolylisoleucylphenyl alanylisoleucylcysteinylprolylprolylaspartylalanyl aspartylaspartylaspartylleucylleucylarginylglutami nylisoleucylalanylseryltyrosylglycylarginylglycylt yrosylthreonyltyrosylleucylleucylserylarginylalany lglycylvalylthreonylglycylalanylglutamylasparaginy larginylalanylalanylleucylprolylleucylasparaginylh istidylleucylvalylalanyllysylleucyllysylglutamylty rosylasparaginylalanylalanylprolylprolylleucylglut aminylglycylphenylalanylglycylisoleucylserylalanyl prolylaspartylglutaminylvalyllysylalanylalanylisol eucylaspartylalanylglycylalanylalanylglycylalanyli soleucylserylglycylserylalanylisoleucylvalyllysyli soleucylisoleucylglutamylglutaminylhistidylasparag inylisoleucylglutamylprolylglutamyllysylmethionyll eucylalanylalanylleucyllysylvalylphenylalanylvalyl glutaminylprolylmethionyllysylalanylalanylthreonyl arginylserine

太强悍了
好像没什么意义啊？

  的确强悍啊!!

什么意思额~~~~~

不是smiles吗?^_^

这个貌似大一的英语书上就有介绍吧

是不是哦，只能说强大

Quote:

引用第5楼lydon-z于2007-08-08 23:39发表的  :
这个貌似大一的英语书上就有介绍吧

大一那个比这个短多了.

就，就，就你觉得这个有意思不？

真的还是假的啊

谁用这个单词将受到国际谴责.

Quote:

引用第4楼neil1987于2007-08-08 23:34发表的  :
不是smiles吗?^_^

就是就是，哈哈

太强悍了!就是没什么意义啊!

纯属扯淡    

这还是单词么？