Pteridospermaphyta

Từ điển WordNet v3.1 - WordNet Dictionary

noun

used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales
• Syn:
Pteridospermae, group Pteridospermae, group Pteridospermaphyta
• Hypernyms:
taxonomic group, taxonomic category, taxon