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.
ounce (oz)
ounce
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 (ouns) n. Abbr. oz, oz. 1. A unit of weight in the US Customary System, an avoirdupois unit equal to 437.5 grains or 28.35 grams. 2. A unit of apothecary weight equal to 480 grains or 31.10 grams. 3. A fluid ounce. |
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
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.
. 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.
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An English system unit of weight that is obsolete in civilized nations, but is still popular in the US; the apothecary ounce is equal to 31.1 g; the avoirdupois ounce is equal to 28.35 g
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