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seed fern
释义
WordReference Random House Unabridged Dictionary of American English © 2024
seed
′
fern′,
Plant Biology, Paleontology
any of various plants of the order Lyginopteridales (or Cycadofilicales), known only as fossils, having fernlike leaves and reproducing by means of seeds. Also called
pteridosperm.
1925–30
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更新时间:2025/12/7 8:36:39