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The oka, okka, or oke (Ottoman Turkish اوقه) was an Ottoman measure of mass, equal to 400 dirhems (Ottoman drams). Its value varied, but it was standardized in the late empire as 1.2829 kilograms.〔OED; but Kélékian gives 1.285 kg〕 'Oka' is the most usual spelling today; 'oke' was the usual contemporary English spelling; 'okka' is the modern Turkish spelling, and is usually used in academic work about the Ottoman Empire. In Turkey, the traditional unit is now called the ''eski okka'' 'old oka' or ''kara okka'' 'black okka'; the ''yeni okka'' 'new okka' is the kilogram.〔Kélékian; Alderson〕 In Greece, the oka (οκά) was standardized at 1.282 kg and remained in use until traditional units were abolished on March 31, 1959〔Babiniotis〕—the metric system had been adopted in 1876, but the older units remained in use.〔Britannica, 1911〕 In Cyprus, the oka remained in use until the 1980s.〔OED〕 In Egypt, the monetary oka weighted 1.23536 kg. In Tripolitania, it weighed 1.2208 kg, equal to 2½ artals. The oka was also used as a unit of volume. In Wallachia, it was 1.283 liters of liquid and 1.537 l of grain (dry measure). In Greece, an oka of oil was 1.280 kg. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oka (mass)」の詳細全文を読む スポンサード リンク
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