Definition of quartumvirate in English:

quartumvirate

noun

rare
  • = quattuorvirate.

Origin

Mid 19th century; earliest use found in Sydney Smith (1771–1845), author and wit. Either from classical Latin quartus fourth + -umvirate, or an alteration of quatrumvirate, after classical Latin quartus fourth.

Pronunciation

quartumvirate

/kwɔːˈtʌmvɪrət/