Definition of Río de Oro in English:

Río de Oro

Syllabification: Rí·o de O·ro
Pronunciation: /ˈrē-ō dē ˈôrō
An arid region on the Atlantic coast of northwestern Africa that forms the southern part of Western Sahara. It was united with Saguia el-Hamra in 1958 to form the province of Spanish Sahara (now Western Sahara).

Definition of Río de Oro in:

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Word of the day humoresque
Pronunciation: ˌhjuːməˈrɛsk
a short, lively piece of music