av·oir·du·pois / ˌävərdəˈpoiz/ •
n. a system of weights based on a pound of 16 ounces or 7,000 grains, widely used in English-speaking countries: [as adj.] avoirdupois weights | a pound avoirdupois. Compare with troy. ∎ humorous weight; heaviness.
†merchandise sold by weight XIV; system of weights based on the 16 oz. pound XV. ME. aver-
— OF. aveir de peis
‘goods of weight’, i.e. aveir
(whence ME. aver
) possession (:- L. habēre
weight (see POISE