English noun: class Pteridospermopsida | |||
1. | class Pteridospermopsida (plant) extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies | ||
Synonyms | Pteridospermopsida | ||
Broader (hypernym) | class | ||
Member holonym | Cycadofilicales, Lyginopteridales, order Cycadofilicales, order Lyginopteridales | ||
Member meronym | class Gymnospermae, division Gymnospermophyta, Gymnospermae, Gymnospermophyta | ||