triarchy

noun
tri·​ar·​chy | \ ˈtrī-ˌär-kē How to pronounce triarchy (audio) \
plural triarchies

Definition of triarchy

1 : government by three persons : triumvirate
2 : a country under three rulers

First Known Use of triarchy

circa 1656, in the meaning defined at sense 1

History and Etymology for triarchy

Greek triarchia, from tri- + -archia -archy

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