/dooh um"veuhr, dyooh-/ , n. , pl. duumvirs, duumviri /-veuh ruy'/ . Rom. Hist.
one of two officers or magistrates jointly exercising the same public function.
[ 1590-1600; duumvirorum, gen. pl. of duoviri two men, equiv. to duo- DUO- + viri, pl. of vir man, c. OE wer (see WEREWOLF) ]