The term TEST CENTER can be summarized as a facility where tests are conducted. The crossword solution for this term is LAB, which stands for laboratory. A laboratory is a place where experiments and tests are conducted in order to gain knowledge or to develop new products. Test centers are often used to evaluate the performance of products, processes, or personnel. They may also be used to diagnose and treat medical conditions. Test centers are typically staffed by professionals who are trained to administer tests and interpret results.