WordNet

a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams (同)oz.
a unit of apothecary weight equal to 480 grains or one twelfth of a pound (同)troy ounce, apothecaries'' ounce
an announcer who reads sports news or describes sporting events (同)sportscaster, sports commentator
an announcer on television (同)television announcer
an announcer whose voice is broadcast on radio

PrepTutorEJDIC

〈C〉『オンス』(重量の単位;《略》『oz.』;常衡で1オンスは1/16ポンド(28.35gr.),金衡で1/12ポンド(31.1gr.)) / 〈C〉液量オンス(1オンスは《米》では1/16パイント(pint),《英》では1/20パイントに等しい) / 《通例否文で》《an ~》少量(の…)《+『of』+『名』》
=snow leopard
…‘を'上下にガタガタ(激しく)揺する / 上下にガタガタ(激しく)揺れる / 動揺

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/03/26 14:05:19」(JST)

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This article is about the unit of mass. For the unit of force, see Pound-force. For the unit of volume, see Fluid ounce. For all other uses, see Ounce (disambiguation).

The ounce (abbreviated oz, from the former Italian word onza, now spelled oncia; apothecary symbol: ℥) is a unit of mass with several definitions, the most commonly used of which is equal to approximately 28 grams. The ounce is used in a number of different systems, including those of mass that form part of the United States customary, and imperial, systems. The size of an ounce varies between systems. The most commonly used ounces today are the international avoirdupois ounce and the international troy ounce.

Etymology

Ounce derives from Latin uncia, a unit that was one twelfth (1/12)^[1] of the Roman pound (libra). Ounce was borrowed twice: first into Old English as ynsan or yndsan from an unattested Vulgar Latin form with ts for c before i (palatalization) and second into Middle English through Anglo-Norman and Middle French (unce, once, ounce).^[2]

Inch comes from the same Latin word, but differs because it was borrowed into Old English and underwent i-mutation or umlaut (u → y) and palatalization (k → ch).

Definitions

Historically, in different parts of the world, at different points in time, and for different applications, the ounce (or its translation) has referred to broadly similar but different standards of mass.

Summary of ounce units
ounce variant	equivalent in grams	equivalent in grains
International avoirdupois ounce	28.3495231	437.5
International troy ounce	31.1034768	480
Apothecaries' ounce	31.1034768	480
Maria Theresa ounce	28.0668
Spanish ounce	28.75
Dutch metric ounce	100
Chinese metric ounce	50

International avoirdupois ounce

The avoirdupois ounce is the most commonly used ounce today. It is defined to be one sixteenth of an avoirdupois pound. The avoirdupois pound is defined as 7000 grains; one ounce is therefore equal to 437.5 grains.

In the international yard and pound agreement of 1959 the United States and countries of the Commonwealth of Nations agreed to define the international avoirdupois ounce to be exactly ^0.45359237⁄₁₆ kg (28.349523125 g) by definition.

The ounce is commonly used as a unit of mass in the United States.

On January 1, 2000, it ceased to be a legal unit of measure within the United Kingdom for economic, health, safety or administrative purposes.^[3]

International troy ounce

A troy ounce (abbreviated as t oz) is equal to 480 grains. Consequently, the international troy ounce is equal to exactly 31.1034768 grams. There are 12 troy ounces in the now obsolete troy pound.

Today, the troy ounce is used only to express the mass of precious metals such as gold, platinum, palladium or silver. Bullion coins are the most common products produced and marketed in troy ounces, but precious metal bars also exist in gram and kilogram (kg) sizes. (A kilogram bullion bar contains 32.15074657 troy ounces.)

For historical measurement of gold,

a fine ounce is a troy ounce of pure gold content in a gold bar, computed as fineness multiplied by gross weight^[4]
a standard ounce is a troy ounce of 22 carat gold, 91.66% pure (an 11 to 1 proportion of gold to alloy material)
in modern day, an ounce of gold (1 troy ounce) is referred as a 99.99% pure gold piece or gold grains (gold shot)

Apothecaries' ounce

The obsolete apothecaries' ounce (abbreviated ℥) equivalent to the troy ounce, was formerly used by apothecaries (now called pharmacists or chemists).^{[citation needed]}

Maria Theresa ounce

"Maria Theresa ounce" was once introduced in Ethiopia and some European countries, which was equal to the weight of one Maria Theresa thaler, or 28.0668 g.^[5]^[6] Both the weight and the value are the definition of one birr, still in use in present-day Ethiopia and formerly in Eritrea.^{[citation needed]}

Spanish ounce

Further information: Spanish customary units

The Spanish pound (Spanish libra) was 460 g.^[7] The Spanish ounce (Spanish onza) was ¹⁄₁₆ of a pound, i.e. 28.75 g.^[8]

Metric ounces

The unit metric ounce is 25 grams^[9] and 20 make the metric pound of 500 grams.

Some countries have redefined their ounces in the metric system.^[10] For example, the German apothecaries ounce of 30 grams, is very close to the previously widespread Nuremberg ounce, but the divisions and multiples come out in metric.

In 1820, the Dutch redefined their ounce (in Dutch, ons) as 100 grams.^[11]^[12] Dutch amendments to the metric system, such as an ons or 100 grams, has been inherited, adopted, and taught in Indonesia beginning in elementary school. It is also listed as standard usage in Indonesia's national dictionary, the Kamus Besar Bahasa Indonesia, and the government's official elementary‐school curriculum.^{[citation needed]}East Asia has a traditional ounce, known as a tael, of varying value. The katti of 16 tael, originally ⁴⁄₃ lb avoirdupois, is now 600 grams. The corresponding tael or tail is then 37.5 grams.^[9] In China, it has been given a metric value of 50 grams.^{[citation needed]}

Ounce-force

Main article: Pound-force

An ounce force is 1/16 of a pound-force, or 0.2780139 newton. It is not necessary to identify it as an avoirdupois ounce; there is no troy ounce-force.^{[clarification needed]}

Fluid ounce

Main article: Fluid ounce

A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl.) is a unit of volume equal to about 28 ml in the imperial system or about 30 ml in the US system. The fluid ounce is sometimes referred to simply as an "ounce" in applications where its use is implicit. The imperial fluid ounce is also equivalent to the volume occupied by 1 imperial ounce of water weighed in air at 62 °F.

Other uses

Fabric weight

Ounces are also used to express the "weight", or more accurately the areal density, of a textile fabric in North America, Asia or the UK, as in "16 oz denim". The number refers to the weight in ounces of a given amount of fabric, either a yard of a given width, or a square yard.^[13]^[14]

Notes and references

^ uncia. Charlton T. Lewis and Charles Short. A Latin Dictionary on Perseus Project.
^ "ounce". Oxford English Dictionary (3rd ed.). Oxford University Press. 2001.
^ "The Units of Measurement Regulations 1995 (Article 4)". 2000-09-20. http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_1.htm. Retrieved 2009-01-26.
^ London Bullion Market Association. "Market Basics". http://www.lbma.org.uk/pages/index.cfm?page_id=17.
^ Greenfield, Richard (1965). Ethiopia: a new political history. F. A. Praeger. p. 327.
^ Ethiopia observer 6. 1962. pp. 187–8.
^ Diccionario de la Real Academia Española, 23rd edition, libra
^ Diccionario de la Real Academia Española, 23rd edition, onza
^ ^a ^b Cardarelli, François (1999). Encyclopaddia of Scientific Units, Weights and Measures. Springer. ISBN 1-85233-682-X.
^ Wittop Koning, D. A.; Houben, G. M. M. (1980). 2000 jaar gewichten in de nederlanden. Lochem-Poperinge: De Tijdstroom. ISBN 9060879651. (Dutch)
^ "Guide to The Hague – Where to turn". Archived from the original on 2008-03-16. http://web.archive.org/web/20080316071124/http://www.outpostthehague.com/relocations/insideguide/wheretoturn.htm. Retrieved 2008-01-01.
^ "Nederlands metriek stelsel". http://nl.wikipedia.org/wiki/Nederlands_metriek_stelsel. Retrieved 2008-01-01.
^ "How to shop the fabric market". http://www.fashiondex.com/howtos/htstfm4.php. Retrieved 2008-12-10.
^ "How Many? A Dictionary of Units of Measurement". http://www.unc.edu/~rowlett/units/dictO.html#ounce. Retrieved 2008-12-10.

External links

Dictionary of Units: Ounce

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拡張検索	「pronounced」「announce」「announcement」「pronounce」「Dounce homogenizer」

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口に出した。明白な。著しい。きっぱりした、決然たる

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Other side effects that are related to the pharmacological effects in the CNS include a reduction in libido, parkinsonian signs, and hyperprolactinemia that may become sufficiently pronounced to cause gynecomastia and galactorrhea.(GOO.853)