apothecaries' unit
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| Noun | 1. |  apothecaries' unit - any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ouncesweight unit, weight - a unit used to measure weight; "he placed two weights in the scale pan" grain - 1/60 dram; equals an avoirdupois grain or 64.799 milligrams scruple - a unit of apothecary weight equal to 20 grains apothecaries' ounce, ounce, troy ounce - a unit of apothecary weight equal to 480 grains or one twelfth of a pound apothecaries' pound, troy pound - an apothecary weight equal to 12 ounces or 373.242 grams |
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