troy weight

Noun
  1. A system of weights used for precious metals and gemstones;
    Based on a 12-ounce pound and an ounce of 480 grains (synset 113738595)
    is a type of: system of weights, weight - a system of units used to express the weight of something
    has: troy unit - any of the unit of the troy system of weights
    same as: troy

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