The longest English word

Do you know what's the longest English Word? If not, Well this article is good for you. The longest English Word is "Pneumonoultramicroscopicsilicovolcanoconiosis" and believe-it or not you would find this word in Oxford Dictionary, according to the Oxford English Dictionary, "a word alleged to mean 'a lung disease caused by the inhalation of volcanic ash, causing inflammation in the lungs. What a tricking word isn't it?