A group of twelve things is called a ''Duodecad''. The ordinal adjective is ''duodenary'', twelfth. The adjective referring to a [[group]] consisting of twelve [[things]] is ''duodecuple''. | A group of twelve things is called a ''Duodecad''. The ordinal adjective is ''duodenary'', twelfth. The adjective referring to a [[group]] consisting of twelve [[things]] is ''duodecuple''. |