zygopterid

名词 n.

英文释义

名词 n.
  1. A member of the Zygopterideae, an extinct family of ferns within order Osmundales having three-dimensional fronds with pinnae in four ranks and a rachis that is radially symmetrical in cross section.
    — As in the zygopterids, the fronds of the coenopterids were […]

词形变化

zygopterids plural
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