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In page Strait of Gibraltar:

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Another Arabic name is Bāb al-maghrib (Arabic: باب المغرب), meaning "Gate of the West" or "Gate of the sunset", and furthermore "Gate of the Maghreb" or "Gate of Morocco".[citation needed] In the Middle Ages it was called in Arabic Az-Zuqāq (الزقاق 'the Passage'), or bḥar az-zuqāq (بحر الزقاق 'the passage sea') and by the Romans Fretum Gaditanum (Strait of Cadiz).[4]