A unit of mass in the Apothecaries' system of weights equal to 12 apounces or 5760 apgrains, and equivalent to 373 grams.
Apothecaries' System of Weights, Apgrain, Apounce
References
Woolf, H. B. (Ed. in Chief). Webster's New Collegiate Dictionary. Springfield, MA: Merriam, p. 1329, 1980.
