Minyan : A traditional Hebrew unit of quantity equal to 10, the number of males aged 13 or over required for a Jewish worship service. (In many modern congregations, both males and females can be included in a minyan.)
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}