The time-integrated exposure divided by the exposure duration. An example is the daily average exposure of an individual to carbon monoxide. (Also called time-weighted average exposure). Valerie Zartarian, Tina Bahadori and Tom McKone. Adoption of an official ISEA glossary. Journal of Exposure Analysis and Environmental Epidemiology (2005) 15, 1-5. doi: 10.1038/sj.jea.7500411 Published online 24 November 2004