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Pronunciation varies by accent · noun
(paleobotany) 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 […]
Phillips and Galtier (2005) also suggested that the ancestral form of the zygopterids was arborescent, based on the fact that the earliest forms (clepsydroid types) are arborescent.
Use zygopterid when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Zygopterid means (paleobotany) 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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
As in the zygopterids, the fronds of the coenopterids were […]
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