Usually means: Extinct seed ferns, resembling ferns.
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We found 6 dictionaries that define the word pteridospermopsida:

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  1. Pteridospermopsida: Vocabulary.com
  2. pteridospermopsida: Dictionary.com
  3. Pteridospermopsida: Rhymezone
  4. pteridospermopsida: FreeDictionary.org
  5. pteridospermopsida: Mnemonic Dictionary
  6. Pteridospermopsida: TheFreeDictionary.com

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Definitions from WordNet (Pteridospermopsida)

▸ noun:  extinct gymnosperms most of Carboniferous to Jurassic: seed ferns and allies


Opposite:
non-extinct plants.

Phrases:
class pteridospermopsida, more...

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Similar:

Opposite:
non-extinct plants.

Phrases:
class pteridospermopsida, more...




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