apothecaries' unit, apothecaries' weight

any weight unit used in pharmacy; an ounce is equal to 480 grains and a pound is equal to 12 ounces

• grain — 1/60 dram; equals an avoirdupois grain or 64.799 milligrams
• scruple — a unit of apothecary weight equal to 20 grains
• dram, drachm, drachma — a unit of apothecary weight equal to an eighth of an ounce or to 60 grains
• ounce, troy ounce, apothecaries' ounce — a unit of apothecary weight equal to 480 grains or one twelfth of a pound
• troy pound, apothecaries' pound — an apothecary weight equal to 12 ounces or 373.242 grams

• weight unit, weight — a unit used to measure weight