(kärōlē´nä) , city (1990 pop. 177,806), Puerto Rico. Located 7 mi (11 km) SE of San Juan, it is a residential suburb of the capital, as well as a commercial and industrial center. Pharmaceuticals and chemical and electronic products are manufactured. Many banking institutions are there, as are the Univ. of Puerto Rico-Carolina, the Universidad del Caribe, and the Colegio Universitario del Este. Louis Muñoz Marín international airport is located in Carolina.