duumvir

/ˈduːəmvər/
noun
  1. One of two officials who jointly hold power or authority, especially in ancient Rome.
    • In ancient Rome, a duumvir was responsible for overseeing public works.
    • Each duumvir had the power to veto the other's decisions.
    • The two duumvirs shared the leadership of the colony equally.
Synonyms
What does "duumvir" mean? | whatsthatwordmean | whatsthatwordmean