noun
fossil gymnospermous trees or climbing plants from the Devonian: seed ferns
• Syn: ↑Cycadofilicales, ↑Lyginopteridales, ↑order Lyginopteridales
• Hypernyms: ↑plant order
• Member Holonyms: ↑Pteridospermopsida, ↑class Pteridospermopsida
• Member Meronyms: ↑Lyginopteris, ↑genus Lyginopteris
Useful english dictionary. 2012.