 pteridospermopsida |
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| 1. | [ noun ] (biology,botany) extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies | |
| Synonyms: | class_Pteridospermopsida | |
| Related terms: | class Gymnospermae Cycadofilicales | |
| Similar spelling: |
Pteridospermaphyta |
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