Procida (prōˈchēdä) [key], narrow volcanic island, c.2 mi (3.2 km) long, Campania, S Italy, at the northwest entrance to the Bay of Naples. The chief town is Procida (1991 pop. 10,559). Wine, fruit, and fish are produced. The 13th-century conspirator John of Procida was lord of the island.
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