duodenary definitions

Oxford Reference Dictionary

adj. proceeding by twelves or in sets of twelve. Etymology: L duodenarius f. duodeni distrib. of duodecim twelve

Webster's 1913 Dictionary

Duodenary Du`o*den"a*ry, a. [L. duodenarius, fr. duodeni twelve each: cf. F. duod['e]naire.] Containing twelve; twelvefold; increasing by twelves; duodecimal.