A unit of mass in the imperial system and a unit of liquid volume. It is represented by the symbol oz. The unit ounce comes from the Latin uncia, meaning one-twelfth. [Koizumi Kesakatsu] ounces of massThere are two types of ounces: the troy ounce, used for precious metals, and the avoirdupois ounce. A troy ounce is 1/12 of a troy pound (approximately 373.24 grams), or 31.1035 grams. An avoirdupois ounce is 1/16 of an avoirdupois pound (0.45359237 kilograms), or approximately 28.35 grams. A troy pound is 5,760 grains, and was established by statute in the 16th century under Queen Elizabeth I, and was used exclusively for precious metals and medicines. There is also a 7,000 grain avoirdupois pound, which is in general use, and was established in 1855, when the troy pound was abolished and the troy ounce became a secondary unit. However, it is still used in the United States, and is also widely used internationally in gold trading. The name troy ounce is said to come from Troyes, a market city in medieval France. [Koizumi Kesakatsu] ounce for liquidWhen it is confusing with the mass unit, it is called a fluid ounce. It is a unit of measurement of a gallon, and its size differs between the UK and the US. In the UK, it is one-fifth gill, or 28.4134 milliliters, while in the US it is one-quarter gill, or 29.5735 milliliters. [Koizumi Kesakatsu] [Reference] |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
ヤード・ポンド法の質量の単位、および液体の体積の単位。記号はozで表す。オンスは12分の1を意味するラテン語のunciaに由来する。 [小泉袈裟勝] 質量のオンス貴金属用のトロイオンスtroy ounceと、常用オンスavoirdupois ounceとがある。トロイオンスはトロイポンド(約373.24グラム)の12分の1で、31.1035グラムにあたる。常用オンスは常用ポンド(0.45359237キログラム)の16分の1で、約28.35グラムである。トロイポンドは5760グレーンとして、16世紀エリザベス1世のとき法令として制定され、貴金属と薬品専用とされた。別に7000グレーンの常用ポンドがあり、これが一般に使われており、1855年に制定されたため、トロイポンドは廃止され、トロイオンスは補助単位となった。しかし、アメリカでは現在も用いられ、また国際的にも金の取引に広く用いられている。トロイオンスの名は中世フランスの市場都市トロアTroyesに由来するという。 [小泉袈裟勝] 液体用のオンス質量のオンスとまぎらわしいときは液量オンスfluid ounceという。ガロンの分量の単位で、イギリスとアメリカでは大きさが異なる。イギリスの場合は5分の1ギルで、28.4134ミリリットル。アメリカの場合は4分の1ギルで、29.5735ミリリットルである。 [小泉袈裟勝] [参照項目] |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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