pre·sid·i·um
noun/prɪˈsɪdiəm/
/prɪˈsɪdiəm/
(also praesidium especially in British English)
- a permanent committee that makes important decisions as part of a government or large political organization, especially in communist countries
（尤指共产主义国家的）常务委员会，主席团 Word Origin1920s: from Russian prezidium, from Latin praesidium ‘protection, garrison’ (see preside).