The dram (archaic spelling drachm; apothecary symbol ℨ) was historically both a coin and a weight. Currently it is both a small mass in the Apothecaries' system of weights and a small unit of volume. This unit is called more correctly fluid dram or in contraction also fluidram.
Greek and Roman drachm are related by the approximate ratio 25 : 32.
The Ottoman dirhem is based on the Sassanian drachm is itself based on the Roman dram/drachm. Modern A...
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The dram (archaic spelling drachm; apothecary symbol ℨ) was historically both a coin and a weight. Currently it is both a small mass in the Apothecaries' system of weights and a small unit of volume. This unit is called more correctly fluid dram or in contraction also fluidram.
Greek and Roman drachm are related by the approximate ratio 25 : 32.
The Ottoman dirhem is based on the Sassanian drachm is itself based on the Roman dram/drachm. Modern Armenian drams, the currency of the Republic of Armenia, share this origin.
In the avoirdupois system, the dram is the mass of ⁄256 pound or ⁄16 ounce. So the dram weighs ⁄32 grains or exactly 1.771 845 195 3125 grams.
The dram (symbol: ʒ) is also the mass of ⁄96 pound (℔) or ⁄8 ounce (℥) in the apothecaries' system that survived until the middle of the 20th century in English-speaking countries. It is equal to 3 scruples (℈) or 60 grains (G). Thus, it is equal to exactly 3.887 9346 grams.
The fluid dram is defined as ⁄8 of a fluid ounce, which...
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