apothecaries' ounce


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Noun1.apothecaries' ounce - a unit of apothecary weight equal to 480 grains or one twelfth of a pound
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
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
apothecaries' pound, troy pound - an apothecary weight equal to 12 ounces or 373.242 grams