Ounce (oz, oz t, toz, or oz ap) [2]
Ounce (oz, oz t, toz, or oz ap) [2] :
A second traditional unit of mass or weight. The troy ounce, traditionally used in pharmacy and jewelry, is 1/12 troy pound, 480 grains, or about 31.1035 grams. Thus the troy ounce equals 192/175 = 1.09714 avoirdupois ounces. This unit is the traditional measure for gold and other precious metals; in particular, the prices of gold and silver quoted in financial markets are the prices per troy ounce. The troy ounce is divided into 20 pennyweight or into 8 troy drams [2]. See: troy weights for additional information. The troy ounce is sometimes abbreviated oz t or toz to distinguish it from the more common avoirdupois ounce; in traditional pharmacy it was abbreviated oz ap
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