I. ˌa-vər-də-ˈpȯiz, ˈa-vər-də-ˌ noun
Etymology: Middle English avoir de pois goods sold by weight, from Anglo-French, literally, goods of weight
Date: 15th century
1. : avoirdupois weight
2. : weight , heaviness ; especially : personal weight
II. adjective
Date: 1755
: expressed in avoirdupois weight
one ounce avoirdupois