'Pteridospermae' definitions:

Definition of 'Pteridospermae'

(from WordNet)
noun
Used in some classification systems: a group of extinct fossil gymnosperms coextensive with the order Cycadofilicales [syn: Pteridospermae, group Pteridospermae, Pteridospermaphyta, group Pteridospermaphyta]

Words containing 'Pteridospermae'