what is avoirdupois
The avoirdupois system (English pronunciation: /ËaevÉrdÉËpÉÉªz/ ; [ËÃ¦vÉrdÉËpÉÉªz] ; avwaÊdypwÉ abbreviated) avdp is a system of (weights more, properly) mass based on a pound of 16. ounceshe earliest known occurrence of the word avoirdupois (or some variant thereof) in England is from a document entitled Tractatus de Ponderibus et Mensuris or Treatise on Weights and Measures.