DRAM or DRACHM, a weight approximately equal to that of the ancient Greek coin ; in apothecaries' weight one-eighth of an ounce, or 6o grains (3.888 grams) ; in avoirdupois weight one sixteenth of an ounce, or 27.34375 grains (1•772 gram) . For short the term is used for a fluid dram (drachm), a measure of capacity equal to one-eighth of a fluid ounce.