字母最長的單詞是什么

　　我們從初中或者更早開始就學習了英語，那么大家知道英語字母中最長的單詞是什么么?下面由學習啦小編幫大家整理資料。

　　世界上最長的單詞共189819個字母，讀完需三個多小時

　　肌聯蛋白這個詞在中文里只有四個字啊四個字，而它的英文學名有多少個字母?十八萬九千八百一十九個!對，你沒看錯，就是189819個字母!這么坑爹的單詞是怎么誕生的?這就要從IUPAC命名法說起了。

　　這個世界上有一個名叫International Union of Pure and Applied Chemistry(國際純粹與應用化學聯合會)的組織，它最有名的工作就是定義化學等領域的專有名詞。它出過一本“藍寶書”(你沒看錯，它的外號就是The Blue Book)IUPAC Nomenclature of Organic Chemistry，也就是《IUPAC有機化學命名法》。

　　理科狗們在高中和大學階段一定被系統命名法折磨過吧?想想2，2，5-三甲基己烷之類的東東。這就是IUPAC命名法的中文版。如果翻譯成英文，三甲基己烷的單詞長達15個字母trimethylhexane。你以為這就算長單詞?呵呵，請看“孟二醇”三個字的英文版：2-hydroxy-α,α,4-trimethylcyclohexanemethanol。這個單詞有多長?數學不好+密集恐懼癥的小編已經數不過來了。

　　因此，一旦遇上某些鏈啊、基啊特別多的化合物，它的名稱也就長的喪心病狂。骨骼肌中含有一種名叫肌聯蛋白的蛋白質，它有25000多個氨基端。這直接導致它的學名成為最長的英文單詞，長度為189819個字母!

　　這直接導致了IUPAC的藍寶書從未發行過紙質版本。

　　Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminyl

　　leucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolylphenylalanylvalylthreony

　　lleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucy

　　lisoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleucylglycylisoleucylprolylphenylalanylse

　　rylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucylglutaminylasparaginylalanylthreonylle

　　ucylarginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanylglutaminylcy

　　steinylphenylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglutaminyllysylhistidylprolylthreon

　　ylisoleucylprolylisoleucylglycylleucylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginy

　　llysylglycylisoleucylaspartylglutamylphenylalanyltyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylas

　　partylserylvalylleucylvalylalanylaspartylvalylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginylglutam

　　inylalanylalanylleucylarginylhistidylasparaginylvalylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolylprolylas

　　partylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosy

　　lthreonyltyrosylleucylleucylserylarginylalanylglycylvalylthreonylglycylalanylglutamylasparaginylarginylalanylalanylleu

　　cylprolylleucylasparaginylhistidylleucylvalylalanyllysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolyll

　　eucylglutaminylglycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylasp

　　artylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucylisoleucylglutamylglut

　　aminylhistidylasparaginylisoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanyl

　　valylglutaminylprolylmethionyllysylalanylalanylthreonylarginylacetylseryltyrosylserylisoleucylthreonylserylprolylseryl

　　glutaminylphenylalanylvalylphenylalanylleucylserylserylvalyltryptophylalanylaspartylprolylisoleucylglutamylleucylleu

　　cylasparaginylvalylcysteinylthreonylserylserylleucylglycylasparaginylglutaminylphenylalanylglutaminylthreonylglutami

　　nylglutaminylalanylarginylthreonylthreonylglutaminylvalylglutaminylglutaminylphenylalanylserylglutaminylvalyltrypto

　　phyllysylprolylphenylalanylprolylglutaminylserylthreonylvalylarginylphenylalanylprolylglycylaspartylvalyltyros

　　yllysylvalyltyrosylarginyltyrosylasparaginylalanylvalylleucylaspartylprolylleucylisoleucylthreonylalanylleucy

　　lleucylglycylthreonylphenylalanylaspartylthreonylarginylasparaginylarginylisoleucylisoleucylglutamylvalylglutam

　　ylasparaginylglutaminylglutaminylserylprolylthreonylthreonylalanylglutamylthreonylleucylaspartylalanylthreony

　　larginylarginylvalylaspartylaspartylalanylthreonylvalylalanylisoleucylarginylserylalanylasparaginylisoleucylasparag

　　inylleucylvalylasparaginylglutamylleucylvalylarginylglycylthreonylglycylleucyltyrosylasparaginylglutaminyl……