The name of the Turkish strait known as Bosphorus has what meaning?

The Bosphorus is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey. It forms part of the continental boundary between Europe and Asia, and separates Asian Turkey from European Turkey. The world's narrowest strait used for international navigation, the Bosphorus connects the Black Sea with the Sea of Marmara, and, by extension via the Dardanelles, the Aegean and Mediterranean Seas.

The original name of the channel comes from an Anglicization of the Ancient Greek Βόσπορος (Bosporos), which was folk-etymologized as βοὸς πόρος, i.e. "cattle strait" (or "Ox-ford"), from the genitive of bous βοῦς "ox, cattle" + poros πόρος "passage", thus meaning "cattle-passage", or "cow passage". This is in reference to the mythological story of Io, who was transformed into a cow, and was subsequently condemned to wander the Earth until she crossed the Bosphorus, where she met the Titan Prometheus, who comforted her with the information that she would be restored to human form by Zeus and become the ancestress of the greatest of all heroes, Heracles (Hercules).