Respirable Particles 2 : Small particles that can be breathed in and reach parts of the respiratory system where they may have a harmful effect (for example, the lungs)
Industrial Accident Prevention Association (IAPA), Centre for Health & Safety Innovation, Glossary of Occupational Health & Safety Terms, Ontario, Canada 2007. http://www.iapa.ca/pdf/iapa_glossary.pdf, (Occupn Hlth and Sfty - Canad) {93}