troy unit

Từ điển WordNet v3.1 - WordNet Dictionary

noun

any of the unit of the troy system of weights
• Hypernyms:
weight unit, weight
• Hyponyms:
grain, pennyweight, ounce, troy ounce, apothecaries' ounce,
troy pound, apothecaries' pound
• Part Holonyms:
troy, troy weight