Meaning of CS in English

I. noun Etymology: Ben B. Corson died 1987 and Roger W. Staughton died 1957 American chemists Date: 1960 a potent tear gas C 10 H 5 ClN 2 used especially for riot control, II. abbreviation capital stock, cesarean section, chief of staff, Christian Science, civil service, conditioned stimulus, county seat

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.