| NOUN | quantity | troy ounce, ounce, apothecaries' ounce | a unit of apothecary weight equal to 480 grains or one twelfth of a pound |
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| Meaning | A unit of apothecary weight equal to 480 grains or one twelfth of a pound. | |
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| Synonyms | ounce, apothecaries' ounce | |
| Part of | troy pound, apothecaries' pound | An apothecary weight equal to 12 ounces or 373.242 grams |
| Parts | dram, drachm, drachma | A unit of apothecary weight equal to an eighth of an ounce or to 60 grains |
| pennyweight | A unit of apothecary weight equal to 24 grains | |
| Broader | apothecaries' unit, apothecaries' weight | Any weight unit used in pharmacy |
| troy unit | Any of the unit of the troy system of weights | |
| Spanish | onza, onza troy | |
| Catalan | unça | |
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