Noun ounce has 3 senses
  1. ounce, troy ounce, apothecaries' ounce - a unit of apothecary weight equal to 480 grains or one twelfth of a pound
    --1 is a kind of apothecaries' unit, apothecaries' weight; troy unit
    --1 is a part of troy pound, apothecaries' pound
    --1 has parts: pennyweight; dram, drachm, drachma
  2. ounce, oz. - a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
    --2 is a kind of avoirdupois unit
    --2 is a part of pound, lb
    --2 has parts: dram
  3. snow leopard, ounce, Panthera uncia - large feline of upland central Asia having long thick whitish fur
    --3 is a kind of big cat, cat
    --3 is a member of Panthera, genus Panthera
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