CS

I. noun Etymology: Ben B. Corson died 1987 and Roger W. Staughton died 1957 American chemists Date: 1960 a potent tear gas C10H5ClN2 used especially for riot control II. abbreviation 1. capital stock 2. cesarean section 3. chief of staff 4. Christian Science 5. civil service 6. conditioned stimulus 7. county seat