According to the Oxford English Dictionary, the longest word in English is: *pneumonoultramicroscopicsilicovolcanoconiosis* It refers to a type of lung disease caused by inhaling very fine silica particles. This word has: - 45 letters - 18 syllables It's considered the longest English word by the Oxford English Dictionary and the Guinness Book of World Records. Would you like to know more about this word or its origins?All Rights Reserved
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