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Noun: troy ounce  troy awn(t)s
  1. A unit of apothecary weight equal to 480 grains or one twelfth of a pound
    - ounce, apothecaries' ounce

Derived forms: troy ounces

Type of: apothecaries' unit, apothecaries' weight, troy unit

Part of: apothecaries' pound, troy pound

Encyclopedia: Troy ounce