pre ‧ sid ‧ i ‧ um BrE AmE , praesidium /prɪˈsɪdiəm, -ˈzɪ-/ noun ( plural presidia /-diə/) [countable]
[ Date: 1900-2000 ; Language: Russian ; Origin: prezidium , from Latin praesidium 'military guards' , from praesidere ; ⇨ ↑ preside ]
a committee chosen to represent a large political organization, especially in a ↑ communist country