Duodenary

• (a.) Containing twelve; twelvefold; increasing by twelves; duodecimal.
Found on http://thinkexist.com/dictionary/meaning/duodenary/

Duodenary

Du`o·den'a·ry adjective [ Latin duodenarius , from duodeni twelve each: confer French duodénaire .] Containing twelve; twelvefold; increasing by twelves; duodecimal.
Found on http://www.encyclo.co.uk/webster/D/131

duodenary

of, like or pertaining to the number twelve
Found on http://phrontistery.info/d.html
No exact match found