noun
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
• Hypernyms: ↑plant order
• Member Holonyms: ↑Coniferopsida, ↑class Coniferopsida, ↑Coniferophytina, ↑subdivision Coniferophytina, ↑Coniferophyta
• Member Meronyms: ↑Cordaitaceae, ↑family Cordaitaceae
Useful english dictionary. 2012.