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