any group of four persons associated in office or authority
Word origin
quadr- + triumvirate
quadrumvirate in American English
(kwɑˈdrʌmvərɪt, -vəˌreit)
noun
a governing or managing group, coalition, or the like, of four persons
Word origin
[1745–55; quadr- + -umvirate (as in triumvirate)]This word is first recorded in the period 1745–55. Other words that entered Englishat around the same time include: artistic, coda, ellipse, input, recapture