Hypertext Webster Gateway: "Troy"

From Webster's Revised Unabridged Dictionary (1913) (web1913)

Troy \Troy\, n.
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 =
117/175 or 1.09714 ounce avoirdupois. Troy weight when
divided, the pound into 12 ounces, the ounce into 8 drams,
the dram into 3 scruples, and the scruple into 20 grains,
is called apothecaries' weight, used in weighing
medicines, etc. In the standard weights of the United
States, the troy ounce is divided decimally down to the
1/10000 part.

From WordNet (r) 1.7 (wn)

n 1: a system of weights used for precious metals and gemstones;
based on a 12-ounce pound and an ounce of 480 grains
[syn: {troy weight}]
2: an ancient city in Asia Minor that was the site of the
Trojan War [syn: {Troy}, {Ilion}, {Ilium}]

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