ounce

noun

1. : symbol for all preceding senses, oz
   1. a unit of weight, equal to pound avoirdupois or 16 drams (28.3495 grams)
   2. a unit of weight, equal to pound troy or 20 pennyweights (31.1035 grams)
   3. a unit of weight, equal to pound apothecaries' weight or 8 drams (31.1035 grams)
   4. fluid ounce
2. any small amount: an ounce of care

noun