presidium
/prɪˈsɪdɪəm/(亦作praesidium)
noun
1- a standing executive committee in a communist country（共产主义国家的）常务委员会。
1.1
Presidium
the committee of this type in the former USSR, which functioned as the legislative authority when the Supreme Soviet was not sitting（苏联）最高苏维埃主席团。
词源
1920s: from Russian prezidium, from Latin praesidium 'protection， garrison' （see PRESIDE）.