Apothecaries' weight

Apothecaries' weight, system of weights once widely used in Great Britain and the United States by druggists, now replaced by the metric system. Apothecaries' weight divides the pound into 12 ounces, the ounce into 8 drams, the dram into 3 scruples, and the scruple into 20 grains.

See also: Weights and measures.