a unit of troy weight equal to 12 troy ounces or 5760 grains or 0.3732417216 kilogram formerly used in weighing gold, silver, and a few other costly materials —called also troy pound
troy pound
noun(troy pound)
a unit of avoirdupois weight equal to 16 avoirdupois ounces or 7000 grains or 0.45359237 kilogram —called also avoirdupois pound