A unit of time equal to 1000 seconds (16 minutes 40 seconds). Although it is never used in ordinary life, the kilosecond has many uses in science. One day is equal to 86.4 kiloseconds
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}