Usually means: Seed ferns from the Paleozoic.
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We found 15 dictionaries that define the word pteridosperm:

General (13 matching dictionaries)
  1. pteridosperm: Merriam-Webster
  2. pteridosperm: Oxford Learner's Dictionaries
  3. pteridosperm: Collins English Dictionary
  4. pteridosperm: Vocabulary.com
  5. pteridosperm: Wordnik
  6. pteridosperm: Wiktionary
  7. pteridosperm: Webster's New World College Dictionary, 4th Ed.
  8. pteridosperm: Dictionary.com
  9. Pteridosperm: Wikipedia, the Free Encyclopedia
  10. pteridosperm: Rhymezone
  11. pteridosperm: FreeDictionary.org
  12. pteridosperm: Mnemonic Dictionary
  13. pteridosperm: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. pteridosperm: Encyclopedia

Science (1 matching dictionary)
  1. pteridosperm: Natural History Terms

(Note: See pteridosperms as well.)

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Definitions from Wiktionary (pteridosperm)

▸ noun:  Any of various extinct gymnosperms, of the division Pteridospermatophyta, resembling ferns, but producing seeds instead of spores

Similar:
seed fern, pteridoid, pteridophyte, peltasperm, pterophyte, pteriodophyte, callipterid, pinophyte, pteridin, petridophyte, more...

Opposite:
non-pteridosperm, gymnosperm, angiosperm

▸ Words similar to pteridosperm

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Similar:
seed fern, pteridoid, pteridophyte, peltasperm, pterophyte, pteriodophyte, callipterid, pinophyte, pteridin, petridophyte, more...

Opposite:
non-pteridosperm, gymnosperm, angiosperm



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