✔ 最佳答案
Well, of course there seems to be some controversy about this. Wikipedia has several examples, noting the Guiness Record holder is the 29 letter floccinaucinihilipilification. Which is defined as "the act of estimating (something) as worthless." Another source note that the 1,185-letter chemical term for "Tobacco Mosaic Virus, Dahlemense Stain", is the longest real word.