troy ounce

1. A unit of apothecary weight equal to 480 grains or one twelfth of a troy pound (synset 113744627)
   is a type of:

   • troy unit - any of the unit of the troy system of weights
   • apothecaries' unit, apothecaries' weight - any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ounces
   has:

   • pennyweight - a unit of apothecary weight equal to 24 grains
   • drachm, drachma, dram - a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
   is a part of: apothecaries' pound, troy pound - an apothecary weight equal to 12 ounces or 373.242 grams
   same as: apothecaries' ounce, ounce

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