Nest 3 : An old English unit of quantity equal to 3. This unit was often, but not always, used for items that nest together, such as 3 bowls or 3 hampers.
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}