troy ounce

Noun troy ounce has 1 sense

• troy ounce(n = noun.quantity) apothecaries' ounce, ounce - a unit of apothecary weight equal to 480 grains or one twelfth of a pound; Array
is a kind of troy unit, apothecaries' unit, apothecaries' weight
has parts: pennyweight, drachm, drachma, dram
is a part of apothecaries' pound, troy pound