triumvir

noun
tri·​um·​vir | \ trī-ˈəm-vər \
plural triumvirs also triumviri\ trī-​ˈəm-​və-​ˌrī , -​ˌrē \

Definition of triumvir

: one of a commission or ruling body of three

First Known Use of triumvir

15th century, in the meaning defined above

History and Etymology for triumvir

Middle English, from Latin, back-formation from triumviri, plural, commission of three men, from trium virum of three men

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The first known use of triumvir was in the 15th century

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