史上最長英文單詞

到底哪個單詞是世界上最長的單詞，相信不少人都有這個困惑，于是現在謎底這樣揭開了！

　　各個領域造就的最長單詞不一而論，大部分情況下公認最長的單詞是已知最大蛋白——肌聯蛋白的IUPAC名，由189,819個字母組成，從Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysyl…開始到…glutamylasparaginylglutaminylglutaminylserylglutamylasparaginylglutaminylglutaminylserxisoleucine結束，大約需要3小時讀完。[1]

　　排除這個單詞后，其次是：

　　pneumonoultramicroscopicsilicovolcanoconiosis (共有45個字母)

　　[ˈnju:mənəuˌʌltrəˌmaikrəsˈkɔpikˈsilikəvɔlˈkeinəukəuniˈəusis]

　　[醫]硅酸鹽沉著病,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]  該單詞完整版—— Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalany

lphenylalanylvalylprolyphenylalanYlvalythreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylsErylleucyllysylisoleucylaspa
rtylthreonylleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylseRylaspartylpr
olylleucylalanylaspartylglycylpRolylthreOnylisoleucylglutaminylasPfraginylalanylthreonylleucylarfinylalanylphenylalanylalanylalanylglyc
ylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleuOylisoleucylarginylglutaminyllysyhistidylprol
ylthreonylisoleucylprolylisoleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysyglycylisoleucylas
partylglutamylphenylalanylthrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalnylaspartylvalylprol
ylvalylglUtaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginyvalylalanylprolyliso
leucylprolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucyla
rginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylarginylalanylglycylvalylthreonylglycyl
alanylglutamYlasparainylarginylalanylalanylleucylprolylleucylasparaginylhistidylleucylValylalanyllysylleucyllysylglutamyltyrosylaspar
aginylalanylalanylprolylprolylleucylglutaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalan
ylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoIeucylisoleucylglutamylgluta
minylHistidylasparaginyliSoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylglutaminylp
rolylmethionlysylalanylalanylthreon——“色氨酸合成酶A蛋白質”(一種含有267種氨基酸酶)的化學名。