[tri.um.vir] n, pl -virs also -vi.ri [L, back-formation fr. triumviri, pl., commission of three men, fr. trium virum of three men] (ca. 1580): one of a commission or ruling body of three
TRIUMVIR
Meaning of TRIUMVIR in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012