cordaitales(n = noun.plant) order cordaitales - extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era; Array
an order of extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian; probably extinct since the Mesozoic. [WordNet 1.5]