Duodecennial definitions

Duodecennial

• (a.) Consisting of twelve years.
Found on http://thinkexist.com/dictionary/meaning/duodecennial/

---

Duodecennial

Du`o·de·cen'ni·al adjective [ Latin duodecennis ; duodecim twelve + annus year.] Consisting of twelve years. [ R.] Ash.
Found on http://www.encyclo.co.uk/webster/D/131

---