TRIUMVIRATE
triumvirate
(noun) a group of three men responsible for public administration or civil authority
Source: WordNet® 3.1
Etymology
Noun
triumvirate (plural triumvirates)
An official group of three people, especially a ruling council of three men and particularly (historical) two such councils in Roman history.
Synonyms
• See government
Coordinate terms
• See government
Source: Wiktionary
Tri*um"vi*rate, n. Etym: [L. triumviratus: cf. F. triumvirat.]
1. Government by three in coalition or association; the term of such
a government.
2. A coalition or association of three in office or authority;
especially, the union of three men who obtained the government of the
Roman empire.
Source: Webster’s Unabridged Dictionary 1913 Edition