n. An order of fossil gymnospermous trees or climbing plants from the Devonian: the seed ferns. Syn. -- Cycadofilicales, order Cycadofilicales, order Lyginopteridales. [ WordNet 1.5 ]
n. An order of fossil gymnospermous trees or climbing plants from the Devonian: the seed ferns. Syn. -- Cycadofilicales, order Cycadofilicales, order Lyginopteridales. [ WordNet 1.5 ]