Definitions

from the GNU version of the Collaborative International Dictionary of English

  • 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.

from The Century Dictionary and Cyclopedia

  • An order of fossil gymnospermous plants, usually made to include the families Cordaitace√¶ and Dolerophyllace√¶: doubts, however, exist with regard to the latter.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. extinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era

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