Английский разговорный словарь (основной) - avoirdupois
Avoirdupois
avoirdupois
ˌævədəˈpɔɪz n. (in full avoirdupois weight) a system of weights based on a pound of 16 ounces or 7,000 grains. [ME f. OF aveir de peis goods of weight f. aveir f. L habere have + peis (see POISE(1))]