史上最长英文单词

到底哪个单词是世界上最长的单词，相信不少人都有这个困惑，于是现在谜底这样揭开了！

　　各个领域造就的最长单词不一而论，大部分情况下公认最长的单词是已知最大蛋白——肌联蛋白的IUPAC名，由189,819个字母组成，从Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysyl…开始到…glutamylasparaginylglutaminylglutaminylserylglutamylasparaginylglutaminylglutaminylserxisoleucine结束，大约需要3小时读完。[1]

　　排除这个单词后，其次是：

　　pneumonoultramicroscopicsilicovolcanoconiosis (共有45个字母)

　　[ˈnju:mənəuˌʌltrəˌmaikrəsˈkɔpikˈsilikəvɔlˈkeinəukəuniˈəusis]

　　[医]硅酸盐沉着病,矽肺病

　　pneumono- (of lung)

　　ultra- (beyond)

　　micro (very small)

　　scopic- (of viewing or observing)

　　silico- (of silicon)

　　volcano

　　coni- ( koni, of dust)

　　osis-(forming the name of a disease)

      [1]  该单词完整版—— Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalany

lphenylalanylvalylprolyphenylalanYlvalythreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylsErylleucyllysylisoleucylaspa
rtylthreonylleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylseRylaspartylpr
olylleucylalanylaspartylglycylpRolylthreOnylisoleucylglutaminylasPfraginylalanylthreonylleucylarfinylalanylphenylalanylalanylalanylglyc
ylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleuOylisoleucylarginylglutaminyllysyhistidylprol
ylthreonylisoleucylprolylisoleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysyglycylisoleucylas
partylglutamylphenylalanylthrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalnylaspartylvalylprol
ylvalylglUtaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginyvalylalanylprolyliso
leucylprolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucyla
rginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylarginylalanylglycylvalylthreonylglycyl
alanylglutamYlasparainylarginylalanylalanylleucylprolylleucylasparaginylhistidylleucylValylalanyllysylleucyllysylglutamyltyrosylaspar
aginylalanylalanylprolylprolylleucylglutaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalan
ylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoIeucylisoleucylglutamylgluta
minylHistidylasparaginyliSoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylglutaminylp
rolylmethionlysylalanylalanylthreon——“色氨酸合成酶A蛋白质”(一种含有267种氨基酸酶)的化学名。