tri·um·vir /traɪˈʌmvɚ/
  三執政官之一人
  Tri·um·vir n.; pl. L. Triumviri E. Triumvirs   Rom. Antiq. One of tree men united in public office or authority.
  Note: ☞ In later times the triumvirs of Rome were three men who jointly exercised sovereign power. Julius Caesar, Crassus, and Pompey were the first triumvirs; Octavianus (Augustus), Antony, and Lepidus were the second and last.
  ◄ ►
  triumvir
       n : one of a group of three sharing public administration or
           civil authority especially in ancient Rome
       [also: triumviri (pl)]