Cordaitales n 1: extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era [syn: {Cordaitales}, {order Cordaitales}]
Cordaitales \Cordaitales\ n. 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. Syn: order {Cordaitales}. [WordNet 1.5]