博斯普鲁斯 bósīpǔlǔsī Bosphorus Origin Definitions Defs Strokes Stroke Words Sentences Sents 博斯普鲁斯海峡 bósīpǔlǔsīhǎixiá Bosphorus Strait The Bosphorus Strait in western Turkey; connects the Black Sea to the Sea of Marmara and serves as a major commercial and strategic passage between the Black Sea and the Mediterranean.