avoirdupois ounce

avoirdupois ounce

A non-SI (International System) unit of mass or weight, equivalent to 28.35 g.
References in periodicals archive ?
A dram, by the way, is 1/16th of an avoirdupois ounce, or 27.
A common avoirdupois ounce is then equivalent to (437.
09711 avoirdupois ounce, those widely used to measure weights in the US and UK.
Strangely, while there is a unique weight for precious metal in the troy ounce, as opposed to the avoirdupois ounce, there is none for wine.