Pneumonoultramicroscopicsilicovolcanoconiosis

Pneumonoultramicroscopicsilicovolcanoconiosis is a lung disease caused by inhaling extremely fine silica dust. The word was coined as an unusually long name for silicosis.

Connect

Silicosis: A lung disease caused by inhaling respirable crystalline silica particles. The coined word names this established disease, rather than a distinct medical condition.
Occupational exposure to silica: Workplace inhalation of airborne crystalline silica generated by industrial tasks. The disease is chiefly associated with repeated exposure in dusty occupations.
National Puzzlers' League: An American organization devoted to word puzzles, founded in 1883. The league's president coined the long word as a playful lexical construction.
Pneumoconiosis: A group of lung diseases caused by inhaling mineral or other inorganic dusts. Silicosis belongs to this broader class of occupational dust diseases.
Crystalline silica: Silicon dioxide in an ordered crystal structure, including quartz and cristobalite. Its respirable particles are the material that causes the disease.
Mining: The extraction of minerals and other geological materials from the Earth. Drilling, cutting, and crushing rock can release respirable silica dust.
Everett M. Smith: An American word-puzzle enthusiast who served as president of the National Puzzlers' League. Smith introduced the coinage at a league meeting in 1935.
Silicosis diagnosis: Clinical assessment of suspected silicosis using exposure history, imaging, and lung evaluation. Diagnosis concerns the actual disease, not the length or use of its coined name.
Respirable dust: Airborne particles small enough to enter the gas-exchanging regions of the lungs. Particle size helps determine whether inhaled silica can reach vulnerable lung tissue.
Sandblasting: A process that propels abrasive particles at a surface to clean or reshape it. Abrasive blasting can expose workers to high concentrations of silica-containing dust.