当你遇到世界上最长的单词，你会怎么做?小编看见之后，是怕怕的。你们来试试读看看或者默写一遍。

世界上最长的单词

Titin(肌联蛋白)是目前已知的最大的蛋白质，它的分子量为2700kDa(25,000多个氨基端)，长度为1μm，约占肌节的一半，是高度弹性分子。根据IUPAC(国际理论和应用化学联合会)命名规则，该肌联蛋白的名字足足有189819个字母，是名副其实最大的单词。一个坐在那啥事都不干快速读完也要读3个多小时。

Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolylphenylalanylvalylthreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucylisoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylserylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucylglutaminylasparaginylalanylthreonylleucylarginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglutaminyllysylhistidylprolylthreonylisoleucylprolylisoleucylglycylleucylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysylglycylisoleucylaspartylglutamylphenylalanyltyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalanylaspartylvalylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginylvalylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylleucylserylarginylalanylglycylvalylthreonylglycylalanylglutamylasparaginylarginylalanylalanylleucylprolylleucylasparaginylhistidylleucylvalylalanyllysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminylglycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucylisoleucylglu……此处省略N万字

除了这个长得惊人的单词之外，还有一些也是长得难以理解的：

27个字母组成

honorificabilitudinitatibus——出现在大文豪莎士比亚的剧本《空爱一场》(Love's Labour's Lost)里，意思是“不胜光荣”。

28个字母组成

antidisestablishmentarianism——根据范克和华格若尔斯编的《英语新标准辞》里面的解释，这个字的意思是“反对教会与国家分开学说”。它曾被英国首相格来斯顿(William Ewart Gladstone)引述过一次。

29个字母组成

floccinaucinihilipipification——《牛津英语辞典》里就有这个字，意思是“把某事的价值加以抹杀的行为或习惯”。

34个字母组成

supercalifragilisticexpiadocious——出现在一部名叫Mary Poppins的电影里，意思是“好”。

40个字母组成

hepaticocholecystostcholecystntenterostomy——出现在高德编的《医学辞典》里，为一个外科术语，亦即在胆囊与胆管之间或肠子与胆囊之间接人工管子的手术。

45个字母组成

pneumonoultramicyoscpicailicovolcanoconiosis——出现在韦氏辞典第八版的版本中意思是“吸入硅酸盐细末或石英岩灰而形成的肺尘埃沉着病”。矿工特别容易得这种病。

50个字母组成

Antipericatametaanaparcircumvolutiorectumgustpoops of the Coprofied——有个图书馆的书架上，陈列着法国作家拉伯雷着的《葛甘塔和潘特古》故事系列。其中有一本，书名就是这个长长的英文字。

51个字母组成

osseocaynisanguineoviscericartilagininervomedullary——它是人体构造的一个术语，曾出现在英国作家皮考克(Thomas Love Peacock,1785-1866)那本名叫Headlong Hall的小说中。

52个字母组成

aequeosalinocalcalinoceraceoaluminosocupreovitriolie——它是英国医学作者爱德华.史特罗哲(Dr Edward Strother，1675-1737)创造的字，专用来形容英格兰格洛斯特夏布瑞斯陀这个地方的矿泉水成分。(小编：这个矿泉水成分伟大了!)

100个字母组成

bababadalgharaghtakamminarronnkonnbronntonnerronntuonnthunntrovarrhounawnskawntoohoohoordenenthurnuk——就出现在爱尔兰作家乔伊斯(James Joyce,1882-1942)作品Finnegans Wake的扉页，代表“亚当和夏娃的堕落”。

182个字母组成

lopadotemachoselachogaleokranioleipsanodrimhypotrimmatosilphioparaomelitokatakechymenokichlepikossyphophattoperisteralektryonoptekephalliokigklopeleiolagoiosiraiosiraiobaphetraganopterygon——它是从希腊字英译过来的英文字，源出自希腊喜剧作家亚里斯多芬尼斯(Aristophanes,448-385)的剧本The Ecclesiazusae中。它是指由剩余的菜和牛肉煮成的辣味食物。

1913个字母字母组成

MethionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolyphenylalanYlvalythreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylsErylleucyllysylisoleucylaspartylthreonylleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylseRylaspartylprolylleucylalanylaspartylglycylpRolylthreOnylisoleucylglutaminylasPfraginylalanylthreonylleucylarfinylalanylphenylalanylalanylalanylglycylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleuOylisoleucylarginylglutaminyllysyhistidylprolylthreonylisoleucylprolylisoleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysyglycylisoleucylaspartylglutamylphenylalanylthrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalnylaspartylvalylprolylvalylglUtaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginyvalylalanylprolylisoleucylprolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylarginylalanylglycylvalylthreonylglycylalanylglutamYlasparainylarginylalanylalanylleucylprolylleucylasparaginylhistidylleucylValylalanyllysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoIeucylisoleucylglutamylglutaminylHistidylasparaginyliSoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylglutaminylprolylmethionlysylalanylalanylthreon——“色氨酸合成酶A蛋白质”(一种含有267种氨基酸酶)的化学名。