An ancient Hebrew unit of liquid capacity, mentioned several times in the Bible. The unit varied in size over time, but typically it was around 3.7 liters, a little smaller than the U.S. gallon
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}