ARECIBO

town, northern Puerto Rico. It lies on a small inlet near the mouth of the Arecibo River. One of the oldest municipalities in the commonwealth, it was authorized in 1537 by the Spanish crown and settled in 1556. In 1616 it was chartered as a town and in 1778 received the royal title villa. An official U.S. port of entry, the town has Puerto Rico's largest rum distilleries and produces agricultural machinery, clothing, paper, plastics, and sporting goods; it is linked by rail to San Juan. The town has a regional college of the University of Puerto Rico. South of Arecibo is one of the world's most powerful radar-radio telescopes, a 1,000-foot (300-metre) installation used for astronomical research. Pop. (1990) 49,545.