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Jyutping ou3 si1 maan6 dai3 gwok3
Pinyin ào sī màn dì guó

Definitions (CC-CEDICT)
  1. the Ottoman Empire
Definitions (Wiktionary)
  1. name, Mainland-China
    the Ottoman Empire
    (syn.) 鄂圖曼帝國, 鄂图曼帝国