troy
troy — adjective
1. relating to a traditional system for weighing precious metals and gemstones, in
relating to a traditional system for weighing precious metals and gemstones, in which one pound contains twelve ounces instead of the usual sixteen.
The jeweller weighed the gold chain in troy ounces before pricing it.
troy + ounce: the most common compound
A troy pound is about 373 grams, which is lighter than a standard pound.
contrast: troy pound vs standard pound
Camille checked the troy weight of the silver bars at the refinery.
International gold prices are quoted per troy ounce on every trading day.
The old scale in the shop measured only troy units, not metric ones.
- avoirdupois
refers to the standard weight system of 16 ounces per pound; the two systems are contrasting, not interchangeable
文法句型
troy + noun (ounce / pound / weight)
用法筆記
Always placed before the noun it modifies (troy ounce, troy pound, troy weight). Never used predicatively — you cannot say 'this ounce is troy'.
常見錯誤
troy — noun
1. a traditional method of measuring mass that divides one pound into twelve ounces
a traditional method of measuring mass that divides one pound into twelve ounces and one ounce into 480 grains, used internationally for gold, silver, and other precious materials.
Troy is still the standard system for weighing gold on global markets.
uncountable: no article before 'troy'
Mateo learned how to convert between troy and metric units for his jewellery exam.
Most mints around the world use troy when producing official gold bullion bars.
The assay report listed the purity and weight of each bar in troy.
A jeweller who works with precious metals must understand how troy differs from ordinary weights.
- avoirdupois
the standard weight system used for everyday goods in the US and UK, with 16 ounces per pound; opposite of troy in usage scope
文法句型
troy (used without article in specialised contexts)
用法筆記
Used without an article in specialised contexts (in troy, measured in troy). Frequently modifies terms like ounce, pound, and grain to specify the measurement system.