Source : Webster's Revised Unabridged Dictionary (1913)

Septemvir \Sep*tem"vir\, n.; pl. E. {Septemvirs}, L.
   {Septemviri}. [L. septemviri, pl.; septem seven + viri, pl.
   of vir man.] (Rom. Hist.)
   One of a board of seven men associated in some office.