A traditional unit of force, equal to 2000 pounds of force (about 8.8964 kilonewtons) in the U.S. and 2240 pounds of force (about 9.9640 kilonewtons) in Britain
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}