世界上最長的英文單詞有多長?當小編知道答案時，整個人都不好了。肌聯蛋白這個詞在中文裡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!這麼坑爹的單詞是怎麼誕生的?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+密集恐懼症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。
哈哈，大家可以往下繼續看自行感受一下濃縮版~
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