Aztla de Terrazas (AHST-lah dai tai-RAH-sahs), town (1990 pop. 5,845), San Luis Potosí, E Mexico, on fertile gulf plain, 38 mi/61 km SSE of Ciudad Valles, and 3 mi/5 km off Inter-Amer. Highway 85; 21°28'N 98°60'W. Tobacco, sugar, coffee, fruit; livestock. Formerly Alfredo M. Terrazas.