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A system of liquid volume measure used in pharmacy. It has been largely replaced by measures of the metric system.
(Pharmacology) a system of liquid volume measure used in pharmacy in which 60 minims equal 1 fluid drachm, 8 fluid drachms equal 1 fluid ounce, and 20 fluid ounces equal 1 pint
a system of units used chiefly in compounding and dispensing liquid drugs.