or Averdupois (from the French avoir de pois, goods of weight), the name of a system of weights used in Great Britain and America for all commodities except the precious metals, gems and medicines. The foundation of the system is the grain. A cubic inch of water weighs 252.458 grains. Of this grain 7000 now (see Weights And Measures) make a pound avoirdupois. This pound is divided into 16 oz., and these ounces into 16 drachms.
Avoirdupois Weight. Drachm, 16=ounce, 16=pound, r4=stone, 2=quarter, 4=hundred, 20=ton. 2 7.3 grains 437'5 7000 98,000 x96,000 grs. 112 lb 2240 To.