a small US island near San Francisco where there is a former prison 阿尔卡特拉斯岛（旧金山附近的美属小岛，有一旧时的监狱） CultureThe island was known as ‘the Rock’. The prison was used from 1934 to 1963 for the country's most dangerous prisoners, including Al Capone. It is now a popular tourist attraction.Word Originfrom Spanish alcatraz ‘pelicans’, which were once common there.