|a system of weights, formerly used in pharmacy, based on the Troy ounce, which contains 480 grains. 1 grain is equal to 0.065 gram|
apothecaries' weight n.
A system of weights used in compounding prescriptions and in which an ounce equals 480 grains and a pound equals 12 ounces.
|apothecaries' weight (ə-pŏth'ĭ-kěr'ēz) Pronunciation Key
A system of weights used in pharmacy and based on an ounce equal to 480 grains and a pound equal to 12 ounces. It has been largely replaced by measures of the metric system.