secretariat
/ˌsekrəˈteərɪət/noun
1- a permanent administrative office or department, especially a governmental one秘书处, 书记处。
1.1
- treated as sing. or pl. the staff working in such an office秘书（或书记）处全体工作人员。
词源
early 19th cent.: from French secrétariat, from medieval Latin secretariatus, from secretarius （see SECRETARY）.