TROYS
TROY
Troy, n.
Definition: Troy weight. Troy weight, the weight which gold and silver,
jewels, and the like, are weighed. It was so named from Troyes, in
France, where it was first adopted in Europe. The troy ounce is
supposed to have been brought from Cairo during the crusades. In this
weight the pound is divided into 12 ounces, the ounce into 20
pennyweights, and the pennyweight into 24 grains; hence, the troy
ounce contains 480 grains, and the troy pound contains 5760 grains.
The avoirdupois pound contains 7000 troy grains; so that 175 pounds
troy equal 144 pounds avoirdupois, or 1 pound troy = 0.82286 of a
pound avoirdupois, and 1 ounce troy = 1apothecaries' weight, used in
weighing medicines, etc. In the standard weights of the United
States, the troy ounce is divided decimally down to the
Source: Webster’s Unabridged Dictionary 1913 Edition