A system of mass measurement based on the 20- ounce pound and the 20-pennyweight ounce.
troy system
troy system
[′trȯi ‚sis·təm] (mechanics) A system of mass units used primarily to measure gold and silver; the ounce is the same as that in the apothecaries' system, being equal to 480 grains or 31.1034768 grams. Abbreviated t. Also known as troy weight.MedicalSeetroy weightLegalSeeTroy weightFinancialSeeTroy Weight