Longest English Word?

Although, I’m sure you were rooting for supercalifragilisticespiallidocious, but unfortunately, it is not in the running for the longest English word. The longest English word (by technicality) has 189,819 letters and is the chemical name of titin (which is also the largest known protein). This is not in the Dictionary and has been disputed as to whether it is in fact even a word. The longest word recorded in a major dictionary has 45 letters and refers to a condition of the lungs caused by breathing in dust causing the lungs to become inflamed. Look here for more information: