Avoirdupois system | Article about Avoirdupois system by The Free Dictionary
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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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive
In 1582 Elizabeth 1 established the avoirdupois system
to replace the existing weight systems (i.e., the haverdepoise, avoir-du-pois, and hanseatic merchants' weight systems).
Our grain derives from the French avoirdupois system
that evolved as a means to help regulate the products sold in trade.
The Avoirdupois system
is also of the fourteenth century although its pound of 7000 oz.