The minim (abbreviated min, or ) is a

unit Unit may refer to: Arts and entertainment * UNIT, a fictional military organization in the science fiction television series ''Doctor Who'' * Unit of action, a discrete piece of action (or beat) in a theatrical presentation Music * ''Unit'' (alb ...

volume Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch). The de ...

in both the

imperial Imperial is that which relates to an empire, emperor, or imperialism. Imperial or The Imperial may also refer to: Places United States * Imperial, California * Imperial, Missouri * Imperial, Nebraska * Imperial, Pennsylvania * Imperial, Texa ...

and U.S. customary systems of measurement. Specifically it is of a

fluid drachm The dram (alternative British spelling drachm; apothecary symbol ʒ or ℨ; abbreviated dr) Earlier version first published in ''New English Dictionary'', 1897.National Institute of Standards and Technology (October 2011). Butcher, Tina; Cook, ...

or of a

fluid ounce A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl., old forms ℥, fl ℥, f℥, ƒ ℥) is a unit of volume (also called ''capacity'') typically used for measuring liquids. The British Imperial, the United States customary, and the United St ...

.CIA World Factbook
/ref> The minim was introduced in the 1809 edition of ''The Pharmacopœia of the Royal College of Physicians of London'' as a replacement for the drop, which had previously been the smallest unit of the

apothecaries' system The apothecaries' system, or apothecaries' weights and measures, is a historical system of mass and volume units that were used by physicians and apothecaries for medical prescriptions and also sometimes by scientists."Medicinal-Gewicht, Apotheke ...

. It was observed that the size of a drop can vary considerably depending upon the

viscosity The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inte ...

and

specific gravity Relative density, or specific gravity, is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material. Specific gravity for liquids is nearly always measured with respect to water (molecule), wa ...

of the liquid. (At the time, the phenomenon of surface tension was not well understood.) The minim, on the other hand, was measured with a graduated glass tube known as a "minimometer", later known as the minim-tube. The minim-tube was a type of graduated

pipette A pipette (sometimes spelled as pipett) is a laboratory tool commonly used in chemistry, biology and medicine to transport a measured volume of liquid, often as a media dispenser. Pipettes come in several designs for various purposes with diffe ...

, a device invented in 1791 by

François-Antoine-Henri Descroizilles Titration (also known as titrimetry and volumetric analysis) is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte (a substance to be analyzed). A reagent, termed the ''titrant'' ...

. Apothecaries' measures are fully defined in the United Kingdom's Weights and Measures Act of 1878, but the UK's 1963 Weights and Measures Act provided for the abolition of the minim,

fluid scruple The scruple (℈) is a small unit in the apothecaries' system, derived from the old Roman ' () unit ('' scrupulus''/''scrupulum'').__NOTOC__ Mass unit The scruple is ounce, dram, or 20 grains. It is therefore equal to 1.2959782 grams. T ...

, and fluid drachm, all already obsolete. Actual delegalization occurred on 1 February 1971. The use of the minim, along with other such measures, has been reduced by the adoption of the

metric system The metric system is a system of measurement that succeeded the Decimal, decimalised system based on the metre that had been introduced in French Revolution, France in the 1790s. The historical development of these systems culminated in the d ...

, and even in the least metricated countries, pharmacy is largely metricated and the

is deprecated. The unit may rarely persist in some countries in the measurement of dosages of medicine.

Definitions

References and notes

Units of volume Customary units of measurement in the United States Imperial units

External links

Unicode Miscellaneous Symbols
{{United States Customary Units