ounce

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ounce

 (oz) [owns]
1. in the apothecaries' system, a unit of weight equal to ¹⁄₁₂ of a pound or 480 grains (31.103 grams); symbol ℥. See also Table of Weights and Measures in the Appendix.
2. in the avoirdupois system, a unit of weight equal to ¹⁄₁₆pound (28.3495 grams).
fluid ounce in the apothecaries' system, a unit of liquid measure equal to 8 fluid drams (29.57 ml). See also Table of Weights and Measures in the Appendix.
a unit of capacity (liquid measure) of the apothecaries' system. In the United States, it is 8 fluid drams, one sixteenth of a pint, or the equivalent of 29.57 mL. In Great Britain, it is an imperial ounce and is 8 (imperial) fluid drams but is one twentieth of an (imperial) pint, or 28.41 mL. See also Table of Weights and Measures in the Appendix.

ounce (oz.),

(owns),
A weight containing 480 g, or 1/12 pound troy and apothecaries' weight, or 437.5 g, 1/16 pound avoirdupois. The apothecary oz (used in the USP) contains 8 drams and is equivalent to 31.10349 g; the avoirdupois oz is equivalent to 28.35 g.
[L. uncia, the twelfth part (of a pound or foot) hence also inch]

ounce

(oz) (ouns) a measure of weight. In the avoirdupois system, 116 lb, 28.3495 g, or 437.5 grains; in the apothecaries' system, 112 lb, 31.03 g, or 480 grains.
fluid ounce  (fl oz) a unit of liquid measure of the apothecaries' system; in the United States it is one-sixteenth of a pint, or 29.57 mL. In Great Britain, (imperial ounce), it is one-twentieth of an (imperial) pint, or 28.41 mL.

ounce (oz)

[ouns]
Etymology: L, uncia, one twelfth
a unit of mass equal to 1/16 of a pound avoirdupois or 28.349 grams. Also called ounce avoirdupois.

ounce

An English, non-SI (International System) unit of weight, largely obsolete but still popular in the US. The apothecary ounce is equal to 31.1 g; the avoirdupois ounce is equal to 28.35 g.

ounce

An English system unit of weight that is obsolete in civilized nations, but is still popular in the US; the apothecary ounce is equal to 31.1 g; the avoirdupois ounce is equal to 28.35 g

ounce

(owns)
1. A weight containing 480 gr, or 1/12 pound troy and apothecaries' weight, or 4371/2 grains; 1/16 pound avoirdupois. The apothecary ounce (used in the USP) contains 8 drams and is equivalent to 31.10349 grams, the avoirdupois ounce is equivalent to 28.35 g.
2. Fluid-ounce; United States: 1/128 U.S. gallon (29.57 mL, 1.804 cubic inches). British Imperial System: the volume occupied by 1 avoirdupois ounce of distilled water at 62° F (28.41 mL, 1.734 cubic inches).
[L. uncia, the twelfth part (of a pound or foot) hence also inch]

ounce

(oz.) (owns)
A weight containing 480 g, or 1/12 pound troy and apothecaries' weight, or 437.5 g, 1/16 pound avoirdupois.
[L. uncia, the twelfth part (of a pound or foot) hence also inch]

ounce

1. a measure of weight in both the avoirdupois and the apothecaries' system; abbreviation oz. The ounce avoirdupois is 28.3495 g, 1/16 lb, or 437.5 gr. The apothecaries' ounce is 31.103 g, 1/12 lb, or 480 gr.; . See also Tables 4.1 and 4.2.
2. See snow leopard.

fluid ounce
a unit of liquid measure of the apothecaries' system, being 8 fluid drams, or the equivalent of 29.57 ml.
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