A common unit of radiation dose equal to 0.001 rem or 10 microsieverts (Sv). A millirem is roughly the radiation dose you would receive from wearing a luminous dial watch for a year
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}