tetradarchy

== English == === Etymology === From Ancient Greek τετραδαρχία (tetradarkhía), from τετράς (tetrás, “tetrad, group of four”) + -αρχία (-arkhía, “-archy: rule”). === Noun === tetradarchy (plural tetradarchies) (politics) Alternative form of tetrarchy: rule by four people. === References === "tetradarchy, n.", in the Oxford English Dictionary, Oxford: Oxford University Press.