英语中最长的单词是哪一个？

英语中哪个单词最长？怎么拼写？什么意思？

世界上最长的英文单词：pneumonoultramicroscopicsilicovolcanoconiosis[ \' ,vltrE-,maikrEs\' kCpik\'silikEvCl\'keinEu kEuni\'Eusis ]意思：火山矽肺症 这个由45的字母所构成的单字，要在毫无规则可循的情况下，叫一个20岁以上，脑筋已经开始僵化的人记下来，实在非常困难。 一般人看了只有猛摇头的份。所以，我们应该找出线索来帮助记忆。这个乍见十分冗长的单字，其实仔细观察可以发现是由几个部分构成。pneumono …………「肺」→ 这个单字可以衍生出pneumonia(肺炎)ultra ………...全部

  世界上最长的英文单词：pneumonoultramicroscopicsilicovolcanoconiosis[ \' ,vltrE-,maikrEs\' kCpik\'silikEvCl\'keinEu kEuni\'Eusis ]意思：火山矽肺症 这个由45的字母所构成的单字，要在毫无规则可循的情况下，叫一个20岁以上，脑筋已经开始僵化的人记下来，实在非常困难。
  一般人看了只有猛摇头的份。所以，我们应该找出线索来帮助记忆。这个乍见十分冗长的单字，其实仔细观察可以发现是由几个部分构成。pneumono …………「肺」→ 这个单字可以衍生出pneumonia(肺炎)ultra …………「超」micro …………「微」→ microscope(显微镜)scopic …………「视」silico …………「矽」→ silicon(矽)volcano …………「火山」coniosis …………「症」只要将上述七个部分组合起来，就能了解这个字的字义，也就是「矽肺症」。
  最恐怖、最长的英文单词1913个字母，“色氨酸合成酶a蛋白质”(一种含有267种氨基酸酶)的化学名：methionylglutaminylarginyltyrosylglutamylserylleucyl-phenylalanylalanylglutaminylleucyllysylglutamylarginylly-sylglutamylglycylalanylphenylalanylvalylprolyphenylalany-lvalythreonylleucylglycylaspartylprolylglycylisoleucyl-glutamylglutaminylserylleucyllysylisoleucylaspartylthre-onylleucylisoleucylglutamylalanylglycylalanylasparthlal-anylleucylglutamylleucylglycylisoleucylprolylphenylalany-lserylaspartylprolylleucylalanylaspartylglycylprolylthreon-ylisoleucylglutaminylaspfraginylalanylthreonylleucylarfinyl-alanylphenylalanylalanylalanylglycylvalythreonylprolylalany-lglutaminylcysteinylphenylalanylglutamylmethionylleucylalan-ylleuoylisoleucylarginylglutaminyllysyhistidylprolylthreony-lisoleucylprolylisoleucylglycylleucylmethionyltyrosylalanyla-sparaginylleucylvalylphenylalanylasparaginyllysyglycylisoleuc-ylaspartylglutamylphenylalanylthrosylalanylglutaminylcysteinyl-glutamyllysylvalylglycylvalylaspartylserylvalylleucylvalylalnyl-aspartylvalylprolylvalylglutaminylglutamylserylalanylprolylpheny-lalanylarginylglutaminylalanylalanylleucylarginylhistidylasparag-inyvalylalanylprolylisoleucylprolylisoleucylphenylalanylisoleucyl-phenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylas-partylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyr-osylglycylarginylglycyltyrosylthreonyltyrosylleucylleucylserylarginy-lalanylglycylvalylthreonylglycylalanylglutamylasparainylarginylalan-ylalanylleucylprolylleucylasparaginylhistidylleucylvalylalanyllysyll-eucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylgl-utaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylg-lutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylal-anylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysyli-soieucylisoleucylglutamylglutaminylhistidylasparaginylisoleucylglu-tamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvaly-lphenylalanylcalylglutaminylprolylmethionlysylal-anylalanylthreonylarginylserine。
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