Let's hope we don't get pneumonoultramicroscopicsilicovolcanoconiosis because it is a good bet we can't pronounce it.
According to the Oxford English Dictionary, quoted in Mental Floss, this 45-letter word means "disease that causes an inflammation of the lungs due to the inhalation of fine silicate or quartz dust."
It is a word that is only used as a curiosity and was actually made up by a puzzle maker in the 1930s.
In the long word derby, compound chemical or medical terms are always contenders, but not actually in use. For example, the full name of the protein 'tintin' has 189,819 letters. It takes three hours to pronounce.
Even German, famous for its compound words, removed a 63-letter word from its dictionary in 2013. The word translates to 'the law for the delegation of monitoring beef labeling.'
Guinness claims one word in Sanskrit has 195 Sanskrit letters (or 428 Roman letters), and it is a poetic description, not actually a single word.
