The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis.
Technical words are words that have specific meanings in informational texts, such as science, mathematics, or social studies books. To find them, look for words that are in boldface or italicized.
