This list of 10 long science words also includes the longest word in the English language.
pneumonoultramicroscopicsilicovolcanoconiosis - This 45 letter word is the longest word in a major dictionary. It is a disease of the lungs caused by inhaling very fine silica dust. Another term for the same condition is silicosis.
palmitoyloleoylphosphatidylethanolamine - This is the name of a lipid and is usually shortened to POPE. Lipids are naturally occurring organic compounds such as fats, waxes, oils, sterols, and triglycerides. In combination with proteins and carbohydrates, they make up the main material that is in the structure of cells.
dichlorodiphenyltrichloroethane - Commonly referred to as DDT, this is a synthetic pesticide. Because of its harmful effects on wildlife, it was banned all over the world in 1972.
pseudopseudohypoparathyroidism - This is an inherited disorder characterized by short stature, short hard bones, round face and obesity. Sometimes affected individuals have intellectual disabilities. The name is shortened to pseudoPHP.