avoirdupois

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avoirdupois

, avoirdupois weight
a system of weights used in many English-speaking countries. It is based on the pound, which contains 16 ounces or 7000 grains. 100 pounds (US) or 112 pounds (Brit) is equal to 1 hundredweight and 20 hundredweights equals 1 ton
References in periodicals archive ?
Our grain derives from the French avoirdupois system that evolved as a means to help regulate the products sold in trade.
One of the great drawbacks of the avoirdupois system is that it doesn't have convenient units lighter than ounces, with the obscure exception of the dram, which is still used in shotshells.