fluid ounce

noun

a measure of capacity equal to 1/16 (0.0625) pint (29.6 milliliters) in the U.S., and equal to 1/20 (0.05) of an imperial pint (28.4 milliliters) in Great Britain. : fl. oz; : f

fluid ounce

a unit of capacity equal to the volume of one avoirdupois ounce of distilled water at 62°F: there are twenty fluid ounces in an Imperial pint and sixteen in a US pint

fluid ounce

A unit of liquid volume or capacity in the US Customary System equal to 1 16 of a pint (29.57 milliliters).
See Table at measurement

First recorded in 1880–85

The number of grains per fluid ounce can of course be obtained by multiplying the percentage by 4.375.

The British Pharmacopœia allows four grains of the permanganate of potash (the basis of the solution) to the fluid ounce.

About a fluid ounce of a rather dirty-looking solution of saltpeter resulted, to which a little sugar was added.

Each fluid ounce represents: Thuja Occidentalis, 31⁄2 grains.

Take half a fluid ounce of the two in five gum mucilage, to which add the same quantity of water and thoroughly mix.

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