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A system of units of weight in which the grain is the same as in the avoirdupois system and the pound contains 12 ounces, 240 pennyweights, or 5,760 grains.
troy weight(trɔɪ) or
(Units) a system of weights used for precious metals and gemstones, based on the grain, which is identical to the avoirdupois grain. 24 grains = 1 pennyweight; 20 pennyweights = 1 (troy) ounce; 12 ounces = 1 (troy) pound
[C14: named after the city of Troyes, France, where it was first used]
a system of weights in use for precious metals and gems, in which a pound equals 12 ounces (0.373 kg) and an ounce equals 20 pennyweights or 480 grains (31.103 grams).
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|Noun||1.||troy weight - a system of weights used for precious metals and gemstones; based on a 12-ounce pound and an ounce of 480 grains|
troy unit - any of the unit of the troy system of weights