noun
troy weight
Rare technical term for the troy weight system used for precious metals. Compare トロイ衡, which is more common.
See also: トロイ衡
金衡オンスは約31.1グラムです。
A troy ounce is about 31.1 grams.
金衡ポンドは常衡ポンドより軽い。
A troy pound is lighter than an avoirdupois pound.