A unit of angle measure equal to 0.001 radian. The milliradian equals about 0.057 296, 3.437 75 arcminutes, or 3" 26.265'. In Britain this unit is often called the angular mil
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}