Wiktionary
n. A former unit of mass equal to 480 grains or 1/12th of a troy pound
WordNet
n. a unit of apothecary weight equal to 480 grains or one twelfth of a pound [syn: ounce, apothecaries' ounce]
Usage examples of "troy ounce".
One Augustan denarius equalled in gold at today's London fix ($385/troy ounce) a nominal $3.
The only yardstick I can apply to all four currencies is the troy ounce of fine gold (= 480 grains in both troy and avoirdupois, or 31.
Milt paid five dollars a pennyweight--one twentieth of a troy ounce--for platinum.
With the gold price that day at $ 350 per troy ounce (give or take a cent or two) Hillyard, Cleef s one hundred million was represented by something a little short of fifteen hundred 'good delivery' bars, each bar being of four hundred troy ounces.
Until then the price had been pegged immovably at $35 per Troy ounce.